chore(ec2): support interface VPC endpoint for RAM (#31384)

Add  interface VPC endpoint for Resource Access Manager.

Ref:
* https://aws.amazon.com/about-aws/whats-new/2024/09/aws-resource-access-manager-privatelink/
* https://docs.aws.amazon.com/vpc/latest/privatelink/aws-services-privatelink-support.html

### 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)

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

packages/aws-cdk-lib/aws-ec2/lib/vpc-endpoint.ts

@@ -538,6 +538,7 @@ export class InterfaceVpcEndpointAwsService implements IInterfaceVpcEndpointServ
   public static readonly REKOGNITION_STREAMING = new InterfaceVpcEndpointAwsService('streaming-rekognition');
   public static readonly REKOGNITION_STREAMING_FIPS = new InterfaceVpcEndpointAwsService('streaming-rekognition-fips');
   public static readonly REPOST_SPACE = new InterfaceVpcEndpointAwsService('repostspace');
+  public static readonly RESOURCE_ACCESS_MANAGER = new InterfaceVpcEndpointAwsService('ram');
   public static readonly ROBOMAKER = new InterfaceVpcEndpointAwsService('robomaker');
   public static readonly RECYCLE_BIN = new InterfaceVpcEndpointAwsService('rbin');
   public static readonly S3 = new InterfaceVpcEndpointAwsService('s3');