logic issue in ush/wave_grid_interp_sbs.sh

[JessicaMeixner-NOAA]

What is wrong?

@aerorahul discovered a bug in ush/wave_grid_interp_sbs.sh which we have:
if [ "wht_OK" = 'no' ]

which will never evaluate to true, but then if this is true, we try to copy to fix, which is not okay.....

What should have happened?

We should figure out this code logic and re-code or remove, etc.

What machines are impacted?

All or N/A

What global-workflow hash are you using?

#3098

Steps to reproduce

Make if [ "wht_OK" = 'no' ] -> if [ "${wht_OK}" = 'no' ]

Additional information

No response

Do you have a proposed solution?

No response