Auth: Fix render user OAuth passthrough (#111636)
* devenv: fix volumes section when sources don't contain one
* wip
* Working correctly with improvedExternalSessionHandling on
* Remove not needed lines
* Working with the old flow, tests
* Handle compatibility with the feature toggle, tests wip
* Tests
* Cleanup
* Address feedback
* Align tests
* Add comment
* Fix issue with session removal after the invalidation of tokens
* Remove commented out code
* clean up
(cherry picked from commit 53f4803e98)
e4eecd4f6e