fix: LocalProxy is not mapped warning

[landryb]

(cherry picked from commit apache/superset@c029b53 via apache/superset#33025)

tested locally, working fine and solving apache/superset#26020, already backported upstream in the 5 branch.

[landryb]

after testing a bit, it seems that upstream commit only fixes the issue for connected users, when loading superset without being connected (eg anonymous?) then you get this annoying warning instead:

Aug 26 14:48:11 WARNING:root:Failed to add user to db session: Class 'werkzeug.local.LocalProxy' is not mapped

maybe the logging.warning call should be neuteured in our fork, or the underlying issue actually fixed ? or that's something specific to our integration that doesnt do the right thing when there's no user ?

[landryb]

@jeanpommier btw i still get the warning, even with https://github.com/georchestra/superset/blame/main/config/superset/GeorchestraCustomizations.py#L361 - i dunno if the doesnt work right now comment is related ..

[landryb]

with 1af1746 i dont get warnings anymore - suggested here, hoping for feedback.