ctest: rename TRACK to GROUP
Update command-line options, script variables, and documentation to use the term "group" instead of "track". The old terms are still available for now, but they are now undocumented. This makes our terminology more consistent with CDash. The goal of this change is to make it more clear to our users how CTest and CDash interact with each other.
Showing with 109 additions and 58 deletions