Added a single function that should incorporate all the functionality
of the exisiting `compass.landice.mesh.interp_ais_bedmachine()` and
`compass.landice.mesh.interp_ais_measures()` functions, but that is
general enough to work for both GIS and AIS, as well as for MEASURES
and BedMachine datasets.

Add the list of requested variables to the `args` list by concating.
Previously I was manually creating the space seperated list (i.e string)
when a list of variables was passed to the girdded inerpolator function.
This space seperated string was not correctly parsed by the
`mpas_tool.logging.check_call` function resulting in the variables not
being inerpolated.

Sorting the global indicies will improve memory performance of
`cellsOnCell` and such. Additionally, sorting will help with
PIO decompostion and ice-sheet-coupler communication.

Co-authored-by: Trevor Hillebrand <[email protected]>