Corrected the units in ALE variable documentation

[Hallberg-NOAA]

Added or corrected comments describing the units of many of the variables in
the ALE code. All solutions are bitwise identical, although there are some
unit changes in arguments to unused subroutines.

[codecov-io]

Codecov Report

Merging #1076 into dev/gfdl will decrease coverage by 0.28%.
The diff coverage is 14.28%.

@@             Coverage Diff              @@
##           dev/gfdl    #1076      +/-   ##
============================================
- Coverage     45.98%   45.69%   -0.29%     
============================================
  Files           212      212              
  Lines         67332    67336       +4     
============================================
- Hits          30960    30769     -191     
- Misses        36372    36567     +195     

Impacted Files	Coverage Δ
src/ALE/coord_hycom.F90	0.00% <0.00%> (ø)
src/ALE/coord_rho.F90	16.36% <0.00%> (-0.41%)	⬇️
src/ALE/coord_slight.F90	0.00% <0.00%> (ø)
src/ALE/regrid_interp.F90	1.41% <0.00%> (+0.02%)	⬆️
src/ALE/MOM_regridding.F90	31.42% <29.41%> (-0.31%)	⬇️
src/ALE/coord_zlike.F90	77.55% <100.00%> (+0.95%)	⬆️
src/framework/MOM_diag_mediator.F90	63.43% <100.00%> (ø)
src/framework/MOM_diag_remap.F90	92.79% <100.00%> (ø)
...rc/parameterizations/lateral/MOM_tidal_forcing.F90	0.00% <0.00%> (-68.59%)	⬇️
src/core/MOM_PressureForce_analytic_FV.F90	41.07% <0.00%> (-3.12%)	⬇️
... and 9 more

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[marshallward]

Gaea regression test: https://gitlab.gfdl.noaa.gov/ogrp/MOM6/pipelines/10043

Test has passed; no regressions.