Bugfix 3406 negative value with at main v12.2

[hsoh-u]

Expected Differences

• Do these changes introduce new tools, command line arguments, or configuration file options? [No]
  
  If yes, please describe:
  

• Do these changes modify the structure of existing or add new output data types (e.g. statistic line types or NetCDF variables)? [No]
  
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Pull Request Testing

• Describe testing already performed for these changes:
  

Note: the invalid variable name is not supported for bugfix.

/d1/personal/hsoh/git/bugfixes/bugfix_3406_negative_value_with_at_main_v12.2/MET/bin/plot_data_plane /d1/personal/mccabe/wrf_renewable/wrf/20250406_06/wrfout/wrfout_zlev_d01_2025-04-07_12:00:00 plot_range.ps 'name="S_ZL"; level="(0,@-100--500,*,*)";' -v 7

DEBUG 7: get_index_at_nc_data(min,max) -> Found value -100.00000 (index=1) at Z_ZL by dimension name "num_z_levels_stag"

• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  

• Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [No]

• Do these changes include sufficient testing updates? [No]

• Will this PR result in changes to the MET test suite? [No]
  
  If yes, describe the new output and/or changes to the existing output:
  

• Will this PR result in changes to existing METplus Use Cases? [No]
  
  If yes, create a new Update Truth METplus issue to describe them.

• Do these changes introduce new SonarQube findings? [No]
  
  If yes, please describe:

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[sonarqubecloud]

Quality Gate failed

Failed conditions
18.5% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud

[georgemccabe]

I tested the failing plot_data_plane and point_stat commands using the version built on seneca for this branch (main_v12.2) and confirmed that it now works as expected. Thank you!