[TASK] Remove superfluous namespace within form configuration

Removes the vendor namespace (TYPO3.CMS.Form) within form
configuration.
The compatibility to the notation with the vendor namespace is
maintained, both notations are still possible.

Resolves: #97517
Related: #97520
Releases: main
Change-Id: I406e968c89002f32854729c96349f44bba3263ae
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74490


Tested-by: core-ci <typo3@b13.com>
Tested-by: Elias Häußler <e.haeussler@familie-redlich.de>
Tested-by: Björn Jacob <bjoern.jacob@tritum.de>
Tested-by: waldhacker <hello@waldhacker.dev>
Reviewed-by: Elias Häußler <e.haeussler@familie-redlich.de>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: waldhacker <hello@waldhacker.dev>