[TASK] Disable autocompletion in Install Tool settings

To prevent unwanted entries, the autocomplete attribute
in the Install tool is added with the `off` property.

Resolves: #88709
Releases: master, 9.5
Change-Id: I3c0a343fd76170f6cc37e5e87ad9a5d5d9a52fb9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61331


Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>