### Is there an existing issue for this?

- [X] I have searched the existing issues

### Enhancement description

OpenSearch 2.9 supports a lot of useful features that AWS opensearch also supports, such as being able to use filters in on FAISS searches in the KNN plugin. It would be great to have these in localstack!

### 🧑‍💻 Implementation

this may be as trivial as a version bump? As far as I can tell, localstack is just pulling the opensearch docker image

### Anything else?

_No response_
def send_plain_request(method, url):
            """
            It's basically impossible to send a request without an Accept-Encoding header with Python's standard
            lib when using http.client.
            This function sends a plain request by directly interacting with the HTTPConnection.
            """
            parsed = urlparse(url)
            connection = HTTPConnection(host=parsed.hostname, port=parsed.port)
            connection.putrequest(method, parsed.path, skip_accept_encoding=True)
            connection.endheaders()
            response = connection.getresponse()
            connection.close()
            return response
        plain_response = send_plain_request("GET", opensearch_endpoint)
        assert "cluster_name" in to_str(plain_response.read())
        
        gzip_accept_headers = {"Accept-Encoding": "gzip"}
        gzip_response = requests.get(opensearch_endpoint, headers=gzip_accept_headers, stream=True)
        
        raw_gzip_data = b"".join(
            chunk for chunk in gzip_response.raw.stream(1024, decode_content=False)
        )
        
        assert gzip.decompress(raw_gzip_data)
    @markers.aws.unknown
    def test_domain_version(self, opensearch_domain, opensearch_create_domain, aws_client):