[BUGFIX] Admin-only edit lock can be disabled again

Fixes the Doctrine error:
Incorrect integer value: '' for column 'editlock' at row 1

Releases: main, 12.4, 11.5
Resolves: #103461
Resolves: #103462
Change-Id: I0e3f0344157f66c07681bd29a47f4f51e32e4225
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83541


Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>