Add grid mask for regional domains to speed up nearest n. interpolation

[DusanJovic-NOAA]

Description

This PR adds grid mask to regional output domains, with values indicating whether the output grid point is outside the forecast computational domain. When this mask is present in the esmf fields, the computation of nearest neighbor route handles is much faster, especially if the region of the output grid that is outside the computational domain is large.

Issue(s) addressed

Link the issues to be closed with this PR, whether in this repository, or in another repository.
(Remember, issues should always be created before starting work on a PR branch!)

• fixes creating mask for output domain that is not covered by the computational domain #987

Testing

How were these changes tested? UFS regression test on Ursa
What compilers / HPCs was it tested with? Intel and GNU on Ursa.
Are the changes covered by regression tests? Yes.
Have the ufs-weather-model regression test been run? Yes.
On what platform? Ursa

• Will the code updates change regression test baseline? No.
• Please commit the regression test log files in your ufs-weather-model branch

Dependencies

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Those branches should have matching names (ideally)

Do PRs in upstream repositories need to be merged first?
If so add the "waiting for other repos" label and list the upstream PRs

• waiting on noaa-emc/nems/pull/<pr_number>
• waiting on noaa-emc/fv3atm/pull/<pr_number>