[wip] refactor[tool]: update storage layout format

[charles-cooper]

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[codecov]

Codecov Report

Attention: Patch coverage is 92.59259% with 4 lines in your changes missing coverage. Please review.

Project coverage is 92.05%. Comparing base (dd5a3d9) to head (6a91fb4).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
vyper/cli/vyper_json.py	77.77%	1 Missing and 1 partial ⚠️
vyper/semantics/analysis/imports.py	85.71%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4495      +/-   ##
==========================================
- Coverage   92.06%   92.05%   -0.01%     
==========================================
  Files         120      120              
  Lines       17335    17353      +18     
  Branches     2935     2937       +2     
==========================================
+ Hits        15960    15975      +15     
- Misses        957      960       +3     
  Partials      418      418              

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