cmWorkingDirectory: Check success of current dir changes
The cmWorkingDirectory class was used in a number of places
but there were no checks on whether changing directory was
successful. This merge request adds the ability to check the
result and usage sites have been updated to take appropriate
action if it fails. Tests have also been added for those scenarios
where checks can be implemented without undue complexity. The
tests fail without the updated changes, verifying two cases that
previously allowed ctest to continue a build or test when it
shouldn't have.
Fixes: #17778 (closed)
Edited by Craig Scott