### 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.list_versions()
        assert "Versions" in response
        versions = response["Versions"]
        expected_versions = [
            "OpenSearch_1.1",
            "OpenSearch_1.0",
            "Elasticsearch_7.10",
            "Elasticsearch_7.9",
            "Elasticsearch_7.8",
            "Elasticsearch_7.7",
            "Elasticsearch_7.4",
            "Elasticsearch_7.1",
            "Elasticsearch_6.8",
            "Elasticsearch_6.7",
            "Elasticsearch_6.5",
            "Elasticsearch_6.4",
            "Elasticsearch_6.3",
            "Elasticsearch_6.2",
            "Elasticsearch_6.0",
            "Elasticsearch_5.6",
            "Elasticsearch_5.5",
            "Elasticsearch_5.3",
            "Elasticsearch_5.1",
            "Elasticsearch_5.0",
        ]
        
        for expected_version in expected_versions:
            assert expected_version in versions
    def test_get_compatible_versions(self, opensearch_client):