Feature #2727 point_weight_flag and obtype_as_group_val_flag

[georgemccabe]

Also added deprecation of master_metplus.py that will close #2714

Pull Request Testing

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Added unit tests

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Review changes

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

• Do these changes include sufficient testing updates? [Yes]

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

• Do these changes introduce new SonarQube findings? [No]
  
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• Please complete this pull request review by 10/16/2024.
  

Pull Request Checklist

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• Add any new Python packages to the METplus Components Python Requirements table.
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[JohnHalleyGotway]

I approve of these changes.

I scrolled through the code changes and see no obvious issues. And I reviewed the rendered docs here.