[OpenMP] Move tool tests out of individual folders (#150780)

I did not realize that these were originally in separate folders to
allow for the use of %T. Now that we have switched over to creating dirs
using %t, we can move these into a common folder and make things a
little bit more clean.

GitOrigin-RevId: 8c07a634ca3b16de0d33765f86c616d105eff697
3 files changed