Tool for interpolating MPAS-Ocean output to MALI for forcing standalone simulations

[matthewhoffman]

Script to interpolate existing MPAS-Ocean output files to a MALI mesh to be used to force standalone MALI simulations.

[details to be filled out]

To do

• [ ] add z_bounds array
• [ ] add 3d mask
• [ ] fix xtime

[matthewhoffman]

This is a replacement to #568 after branches diverged.