chore(bedrock): support Anthropic Claude Opus 4.1, gpt-oss-120b and gpt-oss-20b (#35163)

Add new model.

* [Anthropic’s Claude Opus 4.1 now in Amazon
Bedrock](https://aws.amazon.com/about-aws/whats-new/2025/08/anthropic-claude-opus-4-1-amazon-bedrock/)
* [OpenAI open weight models now available on
AWS](https://aws.amazon.com/blogs/aws/openai-open-weight-models-now-available-on-aws/)

### 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*

---------

Co-authored-by: Jorge Diaz <[email protected]>

Author: mazyu36

packages/aws-cdk-lib/aws-bedrock/lib/foundation-model.ts

@@ -254,6 +254,9 @@ export class FoundationModelIdentifier {
   /** Base model "anthropic.claude-opus-4-20250514-v1:0" */
   public static readonly ANTHROPIC_CLAUDE_OPUS_4_20250514_V1_0 = new FoundationModelIdentifier('anthropic.claude-opus-4-20250514-v1:0');
 
+  /** Base model "anthropic.claude-opus-4-1-20250805-v1:0". */
+  public static readonly ANTHROPIC_CLAUDE_OPUS_4_1_20250805_V1_0 = new FoundationModelIdentifier('anthropic.claude-opus-4-1-20250805-v1:0');
+
   /**
    * Base model "anthropic.claude-instant-v1".
    * @deprecated use latest version of the model
@@ -302,6 +305,12 @@ export class FoundationModelIdentifier {
   /** Base model "deepseek.r1-v1:0". */
   public static readonly DEEP_SEEK_R1_V1_0 = new FoundationModelIdentifier('deepseek.r1-v1:0');
 
+  /** Base model "openai.gpt-oss-120b-1:0". */
+  public static readonly OPENAI_GPT_OSS_120B_1 = new FoundationModelIdentifier('openai.gpt-oss-120b-1:0');
+
+  /** Base model "openai.gpt-oss-20b-1:0". */
+  public static readonly OPENAI_GPT_OSS_20B_1 = new FoundationModelIdentifier('openai.gpt-oss-20b-1:0');
+
   /** Base model "luma.ray-v2:0". */
   public static readonly LUMA_RAY_V2_0 = new FoundationModelIdentifier('luma.ray-v2:0');