[FEATURE] Use password policy for new admin users created in ext:install

The password for a new administrative backend user created using the
install extension does now consider the configurable password policy
introduced in #97388

Resolves: #97392
Releases: main
Change-Id: I711071acdd7c8bcf10b04a1ca46b7d486c742f6e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77233


Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>