### 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_
import logging
import threading
import botocore.exceptions
import pytest
from localstack import config
from localstack.constants import ELASTICSEARCH_DEFAULT_VERSION, OPENSEARCH_DEFAULT_VERSION
from localstack.services.opensearch.packages import elasticsearch_package, opensearch_package
from localstack.testing.pytest import markers
from localstack.utils.common import safe_requests as requests
from localstack.utils.common import short_uid, start_worker_thread
LOG = logging.getLogger(__name__)
COMMON_HEADERS = {"content-type": "application/json", "Accept-encoding": "identity"}
INIT_LOCK = threading.Lock()
installed = threading.Event()
def install_async():
    """
    Installs the default elasticsearch version in a worker thread. Used by conftest.py to make
    sure elasticsearch is downloaded once the tests arrive here.
    """
    if installed.is_set():
        return
    def run_install(*args):