[TASK] Declare strict types in ext_tables.php files

Since #94280 it's possible to declare strict types
in ext_tables.php files. This patch does this
through the core.

Resolves: #94984
Related: #94280
Releases: master
Change-Id: I8aee34f0f697992b9ce596dfdeb95926f1fd9c31
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70745


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>