[TASK] Return PSR-7 response for actions in felogin LoginController

Since #92784 Extbase controller actions must return a PSR-7 response.

With this patch, all actions in LoginController now return a proper
PSR-7 response object.

Note: A patch for PasswordRecoveryController will be handled in
a separate patch.

Resolves: #94434
Releases: master
Change-Id: I0db06db312c91b01395a3e0d57b9d2f1087a6326
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69657


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>