[TASK] Deprecate PhpOptionsUtility

The utility class was thinned out in the last TYPO3
versions and now is only used in EXT:install.

The functionality can be moved into EXT:install,
and PhpOptionsUtility can be deprecated, marked
as deprecated and awaiting removal in TYPO3 v10.0.

Resolves: #85102
Releases: master
Change-Id: Ie45720ad70cd2bdd2949553c94fcec15806cb458
Reviewed-on: https://review.typo3.org/57071


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: TYPO3com <no-reply@typo3.com>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>