Merge in CASA/casa6 from CAS-12581 to master
* commit '171c7338c69db11c3f43ff99d6ceace61c3db7ef':
CAS-12581 removing test that was not meaningful that got introduced in CAS-12957
Fixed an issue when the linear interpolation causes gridding and degridding to have grids with different channels
a possible fix for the crash
fix to mosaic gridder crash when number of channels is much larger than data selection (thanks Kumar\!)