[!!!][TASK] Remove tx_extbase_type from fe_groups

This patch removes superfluous TCA definitions of the column
`fe_groups.tx_extbase_type`.

Therefore the former existing recordTypes are also removed
due to the fact that recordTypes in fe_groups are no longer
defined.

If you rely on one this DB column you have to implement them
via TCA/Overrides in your TYPO3 extension.

See also https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.0/Breaking-96107-DeprecatedFunctionalityRemoved.html?highlight=frontenduser
where the proper extbase model has been removed with TYPO3 12.0.

Resolves: #102924
Releases: main
Change-Id: Ic1be551f47416377d7db97dbd71e3282dbf7a07c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81887


Tested-by: Torben Hansen <derhansen@gmail.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Torben Hansen <derhansen@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>