Fix Flask Login user setting for Flask 2.2 and Flask-Login 0.6.2 (#25318)

The Google openid auth backend of ours had hard-coded way of
seting the current user which was not compatible with Flask 2.2

With Flask-login 0.6.2 the user is stored in g module of flask, where
before, it was stored in _request_ctx_stack. Unforatunately the
google_openid rather than using _update_request_context_with_user
set the user directly in context. In Flask-login 0.6.2 this stopped
working.

This change switches to use the _update_request_context_with_user
method rather than directly storing user in context which works before
and after the Flask-Login 0.6.2 change.

Author: potiuk

airflow/providers/google/common/auth_backend/google_openid.py

@@ -23,7 +23,7 @@
 import google
 import google.auth.transport.requests
 import google.oauth2.id_token
-from flask import Response, _request_ctx_stack, current_app, request as flask_request  # type: ignore
+from flask import Response, current_app, request as flask_request  # type: ignore
 from google.auth import exceptions
 from google.auth.transport.requests import AuthorizedSession
 from google.oauth2 import service_account
@@ -101,8 +101,7 @@ def _lookup_user(user_email: str):
 
 
 def _set_current_user(user):
-    ctx = _request_ctx_stack.top
-    ctx.user = user
+    current_app.appbuilder.sm.lm._update_request_context_with_user(user=user)  # type: ignore[attr-defined]
 
 
 T = TypeVar("T", bound=Callable)