[BUGFIX] Move TCA modification of EXT:openid to TCA/Overrides

TCA manipulation code must no longer reside in ext_tables.php, but
moved to Configuration/TCA/Overrides/<tablename>.php. Leftovers
in ext_tables might disturb loading order of TCA changes and spoil
proper caching.

Change-Id: I7b5240eccde3d49531bb734adf26ee623829dc59
Resolves: #59698
Related: #59414
Releases: 6.3, 6.2
Reviewed-on: https://review.typo3.org/30910
Reviewed-by: Olivier Dobberkau
Reviewed-by: Sebastian Fischer
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn