[TASK] Use global namespace when concatenating ext_(localconf/tables)

With using a global namespace the usage of use statements
is not a problem anymore.

Resolves: #94280
Releases: master
Change-Id: I642b47b4257c22fa59a812763e5f92d5a0d2236a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70548


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