[BUGFIX] Avoid undef array access in workspaces module

When a TCA table has no 'ctrl' 'tstamp' field defined,
the workspace module crashes with an undefined array
access for records of this table. Sanitize this.

Resolves: #103650
Releases: main, 12.4
Change-Id: I3f8c6a1788ec2f9e8f03eddaf9c2ed4df5d737e2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83849


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>