chore: improve optimizer rules for comparison operators

[charles-cooper]

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[codecov-commenter]

Codecov Report

Merging #3412 (f28b1db) into master (7ac2d7c) will decrease coverage by 0.33%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##           master    #3412      +/-   ##
==========================================
- Coverage   89.05%   88.73%   -0.33%     
==========================================
  Files          86       86              
  Lines       10792    10800       +8     
  Branches     2449     2453       +4     
==========================================
- Hits         9611     9583      -28     
- Misses        781      816      +35     
- Partials      400      401       +1     

Impacted Files	Coverage Δ
vyper/ir/optimizer.py	97.90% <100.00%> (-0.27%)	⬇️

... and 6 files with indirect coverage changes

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