Bugfix: Fix Point2Grid processing of GFS Ocean data input

[hsoh-u]

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Describe the Problem

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The valid values are too small from the regridded output by point2grid with GSF Ocean data input

Command:

/d1/personal/hsoh/git/pull_request/MET_feature_2857_tripolar_coordinates/bin/point2grid /d1/projects/MET/MET_issues/feature_2857/GFSv17_ocean/gfs.ocean.t00z.6hr_avg.f006.nc G179 testing_GFSocean.nc -field 'name="SST"; level="(0,,)";' -config /d1/personal/hsoh/data/MET-2857/Point2GridConfig_SST -v 4

The log message

DEBUG 4: regrid_nc_variable() -> [Count] data cells: 627, missing: 112687, non_missing: 449964, non mapped cells: 975993 out of 977132
DEBUG 4:        Range:  data: [-1.775440216 - 32.39379501]

Only 0.064% cells have the valid values and the rest of them are missing values.

Other command produces all missing values:
/d1/personal/hsoh/git/pull_request/MET_feature_2857_tripolar_coordinates/bin/point2grid /d1/projects/MET/MET_issues/feature_2857/GFSv17_ocean/gfs.ocean.t00z.6hr_avg.f006.nc "stereo 304 448 33.92 279.26 135.0 25 6367.47 70.0 N" testing_GFSocean.nc -field 'name="SST"; level="(0,,)";' -config /d1/personal/hsoh/data/MET-2857/Point2GridConfig_SST -v 4

WARNING:
WARNING: regrid_nc_variable() ->  There are no matching cells between input and the target grid.
WARNING:
DEBUG 2: Range of data (name="SST"; level="(0,*,*)";)
DEBUG 2:        input: -1.90645 to 32.4159      regridded: -9999 to -9999.

Expected Behavior

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The valid values should more than 1%.

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