[BUGFIX] Fix password evaluation for TCA input field

Password evaluation is only used for display purpose.

Skip password evaluation value processing.
Set the correct value in main and human readable fields.

Resolves: #76456
Releases: master, 7.6
Change-Id: I58d1e2b9922ee21b7ccacb83e7989c9c9c2df02f
Reviewed-on: https://review.typo3.org/48452


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>