ctest: Restore enforcement of RESOURCE_LOCK test property Refactoring in commit 5ff0b4ed57 (cmCTestMultiProcessHandler: Consolidate test readiness checks, 2023-10-20, v3.29.0-rc1~378^2~4) accidentally broke `RESOURCE_LOCK`. Fix it and replace the previous test with one that would have caught this. Fixes: #25843