### Is there an existing issue for this?

- [X] I have searched the existing issues and read the documentation

### Question

I am using serverless framework with localstack and I am unable to define an `AWS::OpenSearchService::Domain` resource. I guess I'll have to use `AWS::Elasticsearch::Domain` instead but it is deprecated. Are there any plans to add `AWS::OpenSearchService::Domain` resource soon? 

### Anything else?

_No response_
response = opensearch_client.get_compatible_versions()
        assert "CompatibleVersions" in response
        compatible_versions = response["CompatibleVersions"]
        assert len(compatible_versions) >= 18
        expected_compatible_versions = [
            {"SourceVersion": "OpenSearch_1.0", "TargetVersions": ["OpenSearch_1.1"]},
            {
                "SourceVersion": "Elasticsearch_7.10",
                "TargetVersions": ["OpenSearch_1.0", "OpenSearch_1.1"],