Electrolyzer Test Harness

[hunterbarber]

Fixes/Resolves:

Electrolyzer test harness

Summary/Motivation:

#1302

Changes proposed in this PR:

• Adds electrolyzer test harness
• Separates costing into temporary cost test file
• Minor change removing duplicated code in the GAC test temporary file

Legal Acknowledgement

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1. I agree my contributions are submitted under the license terms described in the LICENSE.txt file at the top level of this directory.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.39%. Comparing base (fe886b4) to head (ce6ac28).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1321      +/-   ##
==========================================
- Coverage   94.39%   94.39%   -0.01%     
==========================================
  Files         371      371              
  Lines       37922    37922              
==========================================
- Hits        35796    35795       -1     
- Misses       2126     2127       +1     

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[MarcusHolly]

LGTM

[savannahsakhai]

Small typo otherwise LGTM