Fix AWIPS tiled writer handling of odd units in VIIRS EDR products

[djhoese]

@kathys and @cfdierking noticed that some VIIRS EDR products have the units "Meter" which is not CF compliant nor AWIPS compliant. This PR adds a work around to the AWIPS tiled writer to rewrite "Meter" as "meters. I'm making this a "draft PR" for now as I might add more unit conversions if Kathy or Carl find others. This is a small enough fix that is more about AWIPS and input file metadata than the writer operating properly so I won't be adding a test.

• Closes #xxxx
• Tests added
• Fully documented

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.97%. Comparing base (f3a2343) to head (b25107d).
Report is 182 commits behind head on main.

Additional details and impacted files

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##             main    #2876   +/-   ##
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  Coverage   95.97%   95.97%           
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  Files         368      368           
  Lines       53973    53973           
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  Hits        51801    51801           
  Misses       2172     2172           

Flag	Coverage Δ
behaviourtests	4.02% <ø> (ø)
unittests	96.07% <ø> (ø)

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[coveralls]

Pull Request Test Coverage Report for Build 10269680993

Details

• 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 96.073%

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Totals
Change from base Build 10259110188:	0.0%
Covered Lines:	52030
Relevant Lines:	54157

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💛 - Coveralls