### 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_
"""
    Installs the default opensearch version in a worker thread. Used by conftest.py to make
    sure opensearch is downloaded once the tests arrive here.
    """
    if installed.is_set():
        return
    def run_install(*args):
        with INIT_LOCK:
            if installed.is_set():
                return
            LOG.info("installing opensearch default version")
            install_opensearch()
            LOG.info("done installing opensearch default version")
            LOG.info("installing opensearch 1.0")
            install_opensearch("OpenSearch_1.0")
            LOG.info("done installing opensearch 1.0")
            installed.set()
    start_worker_thread(run_install)
@pytest.fixture(autouse=True)
def opensearch():