Include EVM stdlib in staging update validator

[jribbink]

Closes #1693

Description

Adds the EVM stdlib to staging update validator

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 36.11111% with 92 lines in your changes missing coverage. Please review.

Project coverage is 34.18%. Comparing base (819f8bc) to head (74d52d5).

Files	Patch %	Lines
internal/util/checker_environment.go	28.57%	89 Missing and 1 partial ⚠️
internal/migrate/staging_validator.go	80.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1697      +/-   ##
==========================================
+ Coverage   33.90%   34.18%   +0.28%     
==========================================
  Files         100      100              
  Lines        6256     6307      +51     
==========================================
+ Hits         2121     2156      +35     
- Misses       3851     3865      +14     
- Partials      284      286       +2     

Flag	Coverage Δ
unittests	34.18% <36.11%> (+0.28%)	⬆️

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[nvdtf]

⚡

[turbolent]

Great work! 👏