chore(bedrock): support Amazon Nova Multimodal Embeddings (#35904)

Ref: [Amazon Nova Multimodal Embeddings: State-of-the-art embedding model for agentic RAG and semantic search](https://aws.amazon.com/blogs/aws/amazon-nova-multimodal-embeddings-now-available-in-amazon-bedrock/)


### 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: mazyu36

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

@@ -95,6 +95,9 @@ export class FoundationModelIdentifier {
   /** Base model "amazon.nova-premier-v1:0". */
   public static readonly AMAZON_NOVA_PREMIER_V1_0 = new FoundationModelIdentifier('amazon.nova-premier-v1:0');
 
+  /** amazon.nova-2-multimodal-embeddings-v1:0 */
+  public static readonly AMAZON_NOVA_2_MULTIMODAL_EMBEDDINGS_V1_0 = new FoundationModelIdentifier('amazon.nova-2-multimodal-embeddings-v1:0');
+
   /**
    * Base model "ai21.j2-mid".
    * @deprecated use latest version of the model