[BUGFIX] Consider failed logins for felogin redirect mode 'referer'

The redirect mode `referer` has been fixed with #91844. The fix is
however incomplete, since it always uses the current HTTP_REFERER
for redirect evaluation. This is problematic, if the login fails
due to wrong credentials. In such a scenario, the user is
redirected to the login page, which also overwrites the original
HTTP_REFERER and results in the user being redirected to the
login page after successful login.

This patch ensures, that the original HTTP_REFERER is evaluated in
the loginAction and passed as a variable to the login form, where
it is used in the hidden field `referer`. This ensures, that the
initial evaluated referer is kept in the failed login scenario.

Resolves: #99920
Related: #91844
Releases: main, 11.5
Signed-off-by: Torben Hansen <derhansen@gmail.com>
Change-Id: Ibe572832f443beaa9b1997f767a8777f282038c4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77859


Reviewed-by: Felix Nagel
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Felix Nagel
Reviewed-by: Thomas Hohn <tho@gyldendal.dk>