message: fix: remove deprecated ETagResponseMixin
diff: @@ -25,7 +25,7 @@ from typing import Any, Callable, Dict, Optional, TYPE_CHECKING, Union
  from flask import current_app as app, request
  from flask_caching import Cache
  from flask_caching.backends import NullCache
  -from werkzeug.wrappers.etag import ETagResponseMixin
  +from werkzeug.wrappers import Response
  from superset import db
  from superset.extensions import cache_manager
  @@ -175,7 +175,7 @@ def etag_cache(
  def decorator(f: Callable[..., Any]) -> Callable[..., Any]:
  @wraps(f)
  - def wrapper(*args: Any, **kwargs: Any) -> ETagResponseMixin:
  + def wrapper(*args: Any, **kwargs: Any) -> Response:
  # Check if the user can access the resource
  if raise_for_access:
  try:
  