[BUGFIX] Load ext_localconf.php when checking TCA migrations

The "Check TCA in ext_tables.php" module in the Install Tool now loads
the ext_localconf.php per checked extension as well.

Resolves: #89713
Releases: master, 9.5
Change-Id: I55bc23611554cfb0270e1f10a7787dae058609ce
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63801


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Susanne Moog <look@susi.dev>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Susanne Moog <look@susi.dev>