[TASK] Doctrine: migrate EXT:backend/../BackendUserSessionRepository

Doctrine: migrate EXT:backend/Domain/Repository/BackendUserSessionRepository

Resolves: #75956
Releases: master
Change-Id: Ia48eb7be151b1a9db6e0ab51a79993a0637699e2
Reviewed-on: https://review.typo3.org/47947


Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>