[BUGFIX] Avoid symfony/property-access in getGettablePropertyNames()

ObjectAccess::getGettablePropertyNames() has quite the history by now.
It used to be quite simple, an is_callable() check for getters/hassers
and issers of objects. That didn't account for methods with mandatory
method arguments which was fixed by using reflection. Because runtime
reflection is slow, the usage of cached reflection (ClassSchema) had
been introduced. But, during that change, symfony/property-access had
also been introduces, which contradicts the idea of performance gain
because:

- symfony/property-access also uses uncached reflection
- symfony/property-access actually calls the accessors under test

As both is undesirable, the usage of symfony/property-access has been
removed again.

Releases: main, 12.4, 11.5
Resolves: #101176
Change-Id: I2bc796ebeaf2f1357fd3154b711910c6f553f4e4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79675


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