feat(elasticloadbalancingv2): add grpc code matcher for alb (#13948)

With #13570, it is now possible to set the protocol version for ALB target groups, and thus make it working for GRPC.
However, it is not yet possible to define a GrpcCode for the matcher (see [CloudFormation doc](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-elasticloadbalancingv2-targetgroup-matcher.html)).

I added a `healthyGrpcCodes` working the same way as `healthyHttpCodes`.

closes #13947

----

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

Author: ChristopheBougere

packages/@aws-cdk/aws-elasticloadbalancingv2/README.md

@@ -283,6 +283,10 @@ const tg = new elbv2.ApplicationTargetGroup(stack, 'TG', {
   port: 50051,
   protocol: elbv2.ApplicationProtocol.HTTP,
   protocolVersion: elbv2.ApplicationProtocolVersion.GRPC,
+  healthCheck: {
+    enabled: true,
+    healthyGrpcCodes: '0-99',
+  },
   vpc,
 });
 ```

packages/@aws-cdk/aws-elasticloadbalancingv2/lib/shared/base-target-group.ts

@@ -136,6 +136,16 @@ export interface HealthCheck {
    */
   readonly unhealthyThresholdCount?: number;
 
+  /**
+   * GRPC code to use when checking for a successful response from a target.
+   *
+   * You can specify values between 0 and 99. You can specify multiple values
+   * (for example, "0,1") or a range of values (for example, "0-5").
+   *
+   * @default - 12
+   */
+  readonly healthyGrpcCodes?: string;
+
   /**
    * HTTP code to use when checking for a successful response from a target.
    *
@@ -259,7 +269,8 @@ export abstract class TargetGroupBase extends CoreConstruct implements ITargetGr
       healthyThresholdCount: cdk.Lazy.number({ produce: () => this.healthCheck?.healthyThresholdCount }),
       unhealthyThresholdCount: cdk.Lazy.number({ produce: () => this.healthCheck?.unhealthyThresholdCount }),
       matcher: cdk.Lazy.any({
-        produce: () => this.healthCheck?.healthyHttpCodes !== undefined ? {
+        produce: () => this.healthCheck?.healthyHttpCodes !== undefined || this.healthCheck?.healthyGrpcCodes !== undefined ? {
+          grpcCode: this.healthCheck.healthyGrpcCodes,
           httpCode: this.healthCheck.healthyHttpCodes,
         } : undefined,
       }),

packages/@aws-cdk/aws-elasticloadbalancingv2/test/alb/target-group.test.ts

@@ -166,11 +166,29 @@ describe('tests', () => {
     new elbv2.ApplicationTargetGroup(stack, 'TargetGroup', {
       vpc,
       protocolVersion: elbv2.ApplicationProtocolVersion.GRPC,
+      healthCheck: {
+        enabled: true,
+        healthyGrpcCodes: '0-99',
+        interval: cdk.Duration.seconds(255),
+        timeout: cdk.Duration.seconds(192),
+        healthyThresholdCount: 29,
+        unhealthyThresholdCount: 27,
+        path: '/arbitrary',
+      },
     });
 
     // THEN
     expect(stack).toHaveResource('AWS::ElasticLoadBalancingV2::TargetGroup', {
       ProtocolVersion: 'GRPC',
+      HealthCheckEnabled: true,
+      HealthCheckIntervalSeconds: 255,
+      HealthCheckPath: '/arbitrary',
+      HealthCheckTimeoutSeconds: 192,
+      HealthyThresholdCount: 29,
+      Matcher: {
+        GrpcCode: '0-99',
+      },
+      UnhealthyThresholdCount: 27,
     });
   });