chore(rds): aurora postgres 16.9, 15.13, 14.18, 13.21, sqlserver 13.00.6460.7.v1,14.00.3495.9.v1,15.00.4435.7.v1,16.00.4195.2.v1,16.00.4205.1.v1, mysql 8.0.43, 8.4.6 (#35013)

### Issue # (if applicable)
Close #35065

### Reason for this change
https://aws.amazon.com/about-aws/whats-new/2025/07/amazon-rds-sql-server-supports-cumulative-update-19-sql-server-2022/
https://aws.amazon.com/about-aws/whats-new/2025/05/amazon-rds-postgresql-supports-new-minor-versions/
https://aws.amazon.com/about-aws/whats-new/2025/08/amazon-rds-mySQL-8-0-43-and-8-4-6/
https://aws.amazon.com/about-aws/whats-new/2025/08/amazon-rds-sqlserver-supports-cu-gdr/

### Description of how you validated changes
```console
$ aws rds describe-db-engine-versions --engine sqlserver-ee --output table --query 'DBEngineVersions[*].{Engine:Engine,EngineVersion:EngineVersion}'
--------------------------------------
|      DescribeDBEngineVersions      |
+---------------+--------------------+
|    Engine     |   EngineVersion    |
+---------------+--------------------+
|  sqlserver-ee |  13.00.6460.7.v1   |
...
|  sqlserver-ee |  14.00.3495.9.v1   |
...
|  sqlserver-ee |  15.00.4435.7.v1   |
...
|  sqlserver-ee |  16.00.4195.2.v1   |
|  sqlserver-ee |  16.00.4205.1.v1   |
+---------------+--------------------+
```

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: phuhung273

packages/aws-cdk-lib/aws-rds/lib/cluster-engine.ts

@@ -1152,6 +1152,8 @@ export class AuroraPostgresEngineVersion {
   public static readonly VER_13_18 = AuroraPostgresEngineVersion.of('13.18', '13', { s3Import: true, s3Export: true });
   /** Version "13.20". */
   public static readonly VER_13_20 = AuroraPostgresEngineVersion.of('13.20', '13', { s3Import: true, s3Export: true });
+  /** Version "13.21". */
+  public static readonly VER_13_21 = AuroraPostgresEngineVersion.of('13.21', '13', { s3Import: true, s3Export: true });
   /**
    * Version "14.3".
    * @deprecated Version 14.3 is no longer supported by Amazon RDS.
@@ -1195,6 +1197,8 @@ export class AuroraPostgresEngineVersion {
   public static readonly VER_14_15 = AuroraPostgresEngineVersion.of('14.15', '14', { s3Import: true, s3Export: true });
   /** Version "14.17". */
   public static readonly VER_14_17 = AuroraPostgresEngineVersion.of('14.17', '14', { s3Import: true, s3Export: true });
+  /** Version "14.18". */
+  public static readonly VER_14_18 = AuroraPostgresEngineVersion.of('14.18', '14', { s3Import: true, s3Export: true });
   /**
    * Version "15.2".
    * @deprecated Version 15.2 is no longer supported by Amazon RDS.
@@ -1221,6 +1225,8 @@ export class AuroraPostgresEngineVersion {
   public static readonly VER_15_10 = AuroraPostgresEngineVersion.of('15.10', '15', { s3Import: true, s3Export: true });
   /** Version "15.12". */
   public static readonly VER_15_12 = AuroraPostgresEngineVersion.of('15.12', '15', { s3Import: true, s3Export: true });
+  /** Version "15.13". */
+  public static readonly VER_15_13 = AuroraPostgresEngineVersion.of('15.13', '15', { s3Import: true, s3Export: true });
   /**
    * Version "16.0"
    * @deprecated Version 16.0 is no longer supported by Amazon RDS.
@@ -1249,6 +1255,8 @@ export class AuroraPostgresEngineVersion {
   public static readonly VER_16_8 = AuroraPostgresEngineVersion.of('16.8', '16', { s3Import: true, s3Export: true });
   /** Version "16.8 limitless" */
   public static readonly VER_16_8_LIMITLESS = AuroraPostgresEngineVersion.of('16.8-limitless', '16', { s3Import: true, s3Export: true });
+  /** Version "16.9". */
+  public static readonly VER_16_9 = AuroraPostgresEngineVersion.of('16.9', '16', { s3Import: true, s3Export: true });
   /**
    * Version "17.1"
    * @deprecated Version 17.1 is no longer supported by Amazon RDS.

packages/aws-cdk-lib/aws-rds/lib/instance-engine.ts

@@ -1006,12 +1006,16 @@ export class MysqlEngineVersion {
   public static readonly VER_8_0_41 = MysqlEngineVersion.of('8.0.41', '8.0');
   /** Version "8.0.42". */
   public static readonly VER_8_0_42 = MysqlEngineVersion.of('8.0.42', '8.0');
+  /** Version "8.0.43". */
+  public static readonly VER_8_0_43 = MysqlEngineVersion.of('8.0.43', '8.0');
   /** Version "8.4.3". */
   public static readonly VER_8_4_3 = MysqlEngineVersion.of('8.4.3', '8.4');
   /** Version "8.4.4". */
   public static readonly VER_8_4_4 = MysqlEngineVersion.of('8.4.4', '8.4');
   /** Version "8.4.5". */
   public static readonly VER_8_4_5 = MysqlEngineVersion.of('8.4.5', '8.4');
+  /** Version "8.4.6". */
+  public static readonly VER_8_4_6 = MysqlEngineVersion.of('8.4.6', '8.4');
 
   /**
    * Create a new MysqlEngineVersion with an arbitrary version.
@@ -2811,6 +2815,8 @@ export class SqlServerEngineVersion {
   public static readonly VER_13_00_6450_1_V1 = SqlServerEngineVersion.of('13.00.6450.1.v1', '13.00');
   /** Version "13.00.6455.2.v1". */
   public static readonly VER_13_00_6455_2_V1 = SqlServerEngineVersion.of('13.00.6455.2.v1', '13.00');
+  /** Version "13.00.6460.7.v1". */
+  public static readonly VER_13_00_6460_7_V1 = SqlServerEngineVersion.of('13.00.6460.7.v1', '13.00');
 
   /** Version "14.00" (only a major version, without a specific minor version). */
   public static readonly VER_14 = SqlServerEngineVersion.of('14.00', '14.00');
@@ -2870,6 +2876,8 @@ export class SqlServerEngineVersion {
   public static readonly VER_14_00_3480_1_V1 = SqlServerEngineVersion.of('14.00.3480.1.v1', '14.00');
   /** Version "14.00.3485.1.v1 ". */
   public static readonly VER_14_00_3485_1_V1 = SqlServerEngineVersion.of('14.00.3485.1.v1', '14.00');
+  /** Version "14.00.3495.9.v1 ". */
+  public static readonly VER_14_00_3495_9_V1 = SqlServerEngineVersion.of('14.00.3495.9.v1', '14.00');
 
   /** Version "15.00" (only a major version, without a specific minor version). */
   public static readonly VER_15 = SqlServerEngineVersion.of('15.00', '15.00');
@@ -2920,6 +2928,8 @@ export class SqlServerEngineVersion {
   public static readonly VER_15_00_4420_2_V1 = SqlServerEngineVersion.of('15.00.4420.2.v1', '15.00');
   /** Version "15.00.4430.1.v1". */
   public static readonly VER_15_00_4430_1_V1 = SqlServerEngineVersion.of('15.00.4430.1.v1', '15.00');
+  /** Version "15.00.4435.7.v1". */
+  public static readonly VER_15_00_4435_7_V1 = SqlServerEngineVersion.of('15.00.4435.7.v1', '15.00');
 
   /** Version "16.00" (only a major version, without a specific minor version). */
   public static readonly VER_16 = SqlServerEngineVersion.of('16.00', '16.00');
@@ -2949,6 +2959,10 @@ export class SqlServerEngineVersion {
   public static readonly VER_16_00_4175_1_V1 = SqlServerEngineVersion.of('16.00.4175.1.v1', '16.00');
   /** Version "16.00.4185.3.v1". */
   public static readonly VER_16_00_4185_3_V1 = SqlServerEngineVersion.of('16.00.4185.3.v1', '16.00');
+  /** Version "16.00.4195.2.v1". */
+  public static readonly VER_16_00_4195_2_V1 = SqlServerEngineVersion.of('16.00.4195.2.v1', '16.00');
+  /** Version "16.00.4205.1.v1". */
+  public static readonly VER_16_00_4205_1_V1 = SqlServerEngineVersion.of('16.00.4205.1.v1', '16.00');
 
   /**
    * Create a new SqlServerEngineVersion with an arbitrary version.

packages/aws-cdk-lib/aws-rds/test/cluster-engine.test.ts

@@ -53,14 +53,16 @@ describe('cluster engine', () => {
       'aurora-postgresql9.6');
     expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('10.0', '10') }).parameterGroupFamily).toEqual(
       'aurora-postgresql10');
-    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('13.20', '13') }).parameterGroupFamily).toEqual(
+    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('13.21', '13') }).parameterGroupFamily).toEqual(
       'aurora-postgresql13');
-    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('14.3', '14') }).parameterGroupFamily).toEqual(
+    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('14.18', '14') }).parameterGroupFamily).toEqual(
       'aurora-postgresql14');
-    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('15.7', '15') }).parameterGroupFamily).toEqual(
+    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('15.13', '15') }).parameterGroupFamily).toEqual(
       'aurora-postgresql15');
-    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('16.3', '16') }).parameterGroupFamily).toEqual(
+    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('16.9', '16') }).parameterGroupFamily).toEqual(
       'aurora-postgresql16');
+    expect(DatabaseClusterEngine.auroraPostgres({ version: AuroraPostgresEngineVersion.of('17.5', '17') }).parameterGroupFamily).toEqual(
+      'aurora-postgresql17');
   });
 
   test('supported log types', () => {