[GPU Porting] MOM_EOS.F90

[edoyango]

from benchmark:

• calculate_density_derivs_1d (0.025000)
• calculate_density_1d (0.005000)
• calculate_density_derivs_array (0.005000)

additionally from access-om3

• calculate_tfreeze_1d (7.60s)
• abs_saln_to_prac_saln (3.37s)
• convert_temp_salt_for_teos10 (0.96s)
• cons_temp_to_pot_temp (0.76s)
• calc_spec_vol_derivs_1d (0.18s)
• eos_domain (0.17s)
• calculate_spec_vol_derivs_array_ (0.08s)
• eos_init (0.04s)
• eos_quadrature (0.02s)