Enhancement: Add support for setting file_type in the fcst and obs dictionaries for all wrappers that support it

[georgemccabe]

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Describe the Enhancement

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Time Estimate

1 day

Sub-Issues

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Relevant Deadlines

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Funding Source

PRJ014253 NOAA METPLUS SW

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Define Related Issue(s)

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• METplus, MET, METdataio, METviewer, METexpress, METcalcpy, METplotpy

Enhancement Checklist

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