[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/+/83564
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>

typo3/sysext/beuser/Classes/Controller/PermissionController.php

@@ -183,7 +183,7 @@ public function handleAjaxRequest(ServerRequestInterface $request): ResponseInte
                 break;
             case 'toggle_edit_lock':
                 // Initialize requested lock state
-                $editLockState = !$conf['editLockState'];
+                $editLockState = $conf['editLockState'] ? 0 : 1;
 
                 // Execute TCE Update
                 $tce->start([