Feature #2406 redo usecase rrfs

[bikegeek]

Describe testing already performed for these changes:

on 'seneca':

used this environment: /home/met_test/miniforge3/envs/rrfs_usecase_env

run from bash shell

run: activate /home/met_test/miniforge3/envs/rrfs_usecase_env

created a working directory and under this directory:
- cloned the develop branch of METdataio
- cloned the develop branch of METcalcpy
- cloned the develop branch of METplotpy
- cloned the feature_2406_usecase_RRFS branch of METplus

set up the [usecase_setup.sh.txt](https://github.com/dtcenter/METplus/files/14149406/usecase_setup.sh.txt):
    save in the WORKING_DIR
    remove .txt extension (this was required to save here)
    set WORKING_DIR environment value in the script
    run: source usecase_setup.sh

Downloaded [sample_data-short_range.tgz](https://dtcenter.ucar.edu/dfiles/code/METplus/METplus_Data/feature_2406_usecase_RRFS/sample_data-short_range.tgz) from:
    https://dtcenter.ucar.edu/dfiles/code/METplus/METplus_Data/feature_2406_usecase_RRFS/
    NOTE: Followed instructions for adding data, but the tar file is not appearing in the METplus_Data/v5.1 or v6.0 directory
    for keeping things together, unzip'd and untar'd under the $WORKING_DIR

set up the [user.conf.txt](https://github.com/dtcenter/METplus/files/14149435/user.conf.txt) file for the user system config file:
    saved to $WORKING_DIR
    remove .txt extension (only needed to load file here)
    using the path to MET on 'seneca'

run the use case:
    from anywhere:
    python $METPLUS_BASE/ush/run_metplus.py $METPLUS_BASE/parm/use_cases/model_applications/short_range/UserScript_fcstRRFS_fcstOnly_Reformat_Aggregate_Plot.conf $WORKING_DIR/user.conf

Verify that a reformatted file was created in the $METPLUS_BASE/output/reformatted directory:
    ensemble_stat_ecnt.data

Verify that an aggregation statistics file was created in the $METPLUS_BASE/output/aggregated directory:
    ecnt_aggregated.data

Check that a spread-skill was created in the $METPLUS_BASE/output/plot directory and view it, it should look like this:

short-range_UserScript_fcstRRFS_fcstOnly_Reformat_Aggregate_Plot

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

Perform same steps above

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] Added this use case to the tests in the workflow

Will this PR result in changes to the test suite? [Yes]

Additional data files in the sample_data-short_range.tgz tarball

Please complete this pull request review by [COB Monday February 5].

Pull Request Checklist

See the METplus Workflow for details.

• [ ] Add any new Python packages to the METplus Components Python Requirements table.
• [ ] Review the source issue metadata (required labels, projects, and milestone).
• [ ] Complete the PR definition above.
• [ ] Ensure the PR title matches the feature or bugfix branch name.
• [ ] Define the PR metadata, as permissions allow. Select: Reviewer(s) Select: Organization level software support Project or Repository level development cycle Project Select: Milestone as the version that will include these changes
• [ ] After submitting the PR, select the :gear: icon in the Development section of the right hand sidebar. Search for the issue that this PR will close and select it, if it is not already selected.
• [ ] After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
• [ ] Close the linked issue and delete your feature or bugfix branch from GitHub.

[coveralls]

Pull Request Test Coverage Report for Build 7819858366

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 90.762%

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Totals
Change from base Build 7818836051:	0.0%
Covered Lines:	8508
Relevant Lines:	9374

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💛 - Coveralls