### 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_
index_url_0 = cluster_0.url + "/my-index?pretty"
            index_url_1 = cluster_1.url + "/my-index?pretty"
            response = requests.put(index_url_0)
            assert response.ok, f"failed to put index into cluster {cluster_0.url}: {response.text}"
            assert poll_condition(
                lambda: requests.head(index_url_0).ok, timeout=10
            ), "gave up waiting for index"
            assert not requests.head(index_url_1).ok, "index should not appear in second cluster"
        finally:
            call_safe(cluster_0.shutdown)
            call_safe(cluster_1.shutdown)
@markers.skip_offline
class TestMultiplexingClusterManager:
    @markers.aws.unknown
    def test_multiplexing_cluster(self, monkeypatch):
        monkeypatch.setattr(config, "OPENSEARCH_ENDPOINT_STRATEGY", "domain")
        monkeypatch.setattr(config, "OPENSEARCH_MULTI_CLUSTER", False)
        manager = MultiplexingClusterManager()
        
        domain_key_0 = DomainKey(
            domain_name=f"domain-{short_uid()}",
            region="us-east-1",
            account=TEST_AWS_ACCOUNT_ID,
        )
        domain_key_1 = DomainKey(
            domain_name=f"domain-{short_uid()}",
            region="us-east-1",
            account=TEST_AWS_ACCOUNT_ID,
        )
        cluster_0 = manager.create(domain_key_0.arn, OPENSEARCH_DEFAULT_VERSION)