### 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_
import base64
import copy
import json
import logging
import re
import traceback
from typing import Dict, List, Optional
import botocore
from moto.ec2.utils import generate_route_id
from localstack import config
from localstack.constants import FALSE_STRINGS, S3_STATIC_WEBSITE_HOSTNAME, TEST_AWS_ACCOUNT_ID
from localstack.services.cloudformation.deployment_utils import (
    PLACEHOLDER_AWS_NO_VALUE,
    PLACEHOLDER_RESOURCE_NAME,
    is_none_or_empty_value,
    remove_none_values,
)
from localstack.services.cloudformation.service_models import (
    KEY_RESOURCE_STATE,
    DependencyNotYetSatisfied,
    GenericBaseModel,
)