CMake Nightly Date Stamp
CTest: avoid useless changing of directory

At this point we do not care what the current directory is, as nothing that
requires a specific directory is done. Just make sure that at the end we are
back in the same directory as at the start.
Merge topic 'CTest-less-cd' into next

9969bfb CTest: avoid useless changing of directory
5dd8c01 CMake Nightly Date Stamp