Merge topic 'ctest-regression'

712cb8cb14 ctest: Restore support for -T Test without dashboard configuration
e47dc29967 cmCTestStartCommand: Remove unnecessary code
f54699d31d cmCTest: De-duplicate working directory code

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !10432