[BUGFIX] Set BackendUserAspect earlier to make it usable in TSConfig

This patch fix broken TSConfig condition because of missing backend user aspect.

Resolves: #86229
Releases: master
Change-Id: I6528b5d48a5b5711cad8710d4bfcc6222f9fef9c
Reviewed-on: https://review.typo3.org/58275


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>