Column name utilities shared between LSDB and hats-import.

[delucchi-cmu]

Great! This logic is now semi-duplicated in hats-import, though I think that this handles it better by checking for "lightcurve", "lightcurve.mjd" kinds of problems. We should consider moving some column/nested column checking into hats.

See: astronomy-commons/hats-import#608

[delucchi-cmu]

See: astronomy-commons/lsdb#1098