Enhancement: Update Grid-Diag configuration options

[JohnHalleyGotway]

Describe the Enhancement

Issue dtcenter/MET#3171 and pull request dtcenter/MET#3316 make changes to both the configuration file and output format of the Grid-Diag tool. This issue is to update the METplus Grid-Diag wrapper to handle the following changes to the configuration file.

1. Grid-Diag can now support multiple masking regions. The mask dictionary entries have changed from strings to arrays:
   FROM:

mask = {
   grid = "";
   poly = "";
}

TO:

mask = {
   grid = [];
   poly = [];
}

2. The output written by Grid-Diag is now configurable using the new output_flag dictionary. Please add support for it:

output_flag = {
   histogram_1d = TRUE;
   histogram_2d = TRUE;
   info_theory  = FALSE;
}

Like all the other output_flag options in other MET tools, each entry can be set individually to TRUE or FALSE and all entries can be set to true with output_flag = TRUE; or to false with output_flag = FALSE; Recommend supporting this in a way that's consistent with all other similarly named options in other tools.

Time Estimate

4 hours?

Sub-Issues

Consider breaking the enhancement down into sub-issues.

Relevant Deadlines

Please complete for the METplus 7.0 beta1 release.

Funding Source

7750034 UAlb NOAA METplus UFS

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