Support DMS Serverless

### Name of the resource

Other

### Resource name

AWS::DMS::ReplicationConfig, AWS::DMS::Replication

### Description

These are the resources used by DMS to specify config for DMS Serverless and run replication.

See https://docs.aws.amazon.com/dms/latest/APIReference/API_CreateReplicationConfig.html and https://docs.aws.amazon.com/dms/latest/APIReference/API_StartReplication.html

These new resources would be very roughly analogous to https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-dms-replicationinstance.html and https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-dms-replicationtask.html

And see https://github.com/boto/botocore/commit/ccc9687dd4cf3bda7268a386b56105285a69d2bf#diff-7becd559d18a1e40be3aeef9ca907962a22982c4c2548882824ee2a8238be31b for the full details of the APIs that were added for DMS.

### Other Details

The AWS blog post that announced this feature is https://aws.amazon.com/blogs/aws/new-aws-dms-serverless-automatically-provisions-and-scales-capacity-for-migration-and-data-replication/

Start with the analogous AWS::DMS::ReplicationInstance and AWS::DMS::ReplicationTask resources, then read the CreateReplicationConfig and StartReplication API documentation and the linked botocore commit. Done means AWS::DMS::ReplicationConfig and AWS::DMS::Replication are supported with the properties and operations described by those API references.

Written by the indexing model from the issue text.