feat[venom]: stack spilling to mem

[harkal]

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[codecov]

Codecov Report

❌ Patch coverage is 86.12440% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.26%. Comparing base (31122dc) to head (c0ac60c).

Files with missing lines	Patch %	Lines
vyper/venom/stack_spiller.py	88.73%	8 Missing and 8 partials ⚠️
vyper/venom/venom_to_assembly.py	80.30%	9 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4765      +/-   ##
==========================================
- Coverage   93.30%   93.26%   -0.04%     
==========================================
  Files         137      138       +1     
  Lines       19465    19637     +172     
  Branches     3364     3397      +33     
==========================================
+ Hits        18161    18314     +153     
- Misses        884      895      +11     
- Partials      420      428       +8     

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