feat[venom]: call conv stack return

[harkal]

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[codecov]

Codecov Report

❌ Patch coverage is 82.35294% with 45 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.08%. Comparing base (846bedd) to head (2094374).

Files with missing lines	Patch %	Lines
vyper/venom/basicblock.py	80.76%	9 Missing and 1 partial ⚠️
vyper/venom/check_venom.py	88.31%	8 Missing and 1 partial ⚠️
vyper/venom/ir_node_to_venom.py	87.75%	4 Missing and 2 partials ⚠️
vyper/venom/function.py	0.00%	5 Missing ⚠️
vyper/venom/parser.py	70.58%	2 Missing and 3 partials ⚠️
vyper/venom/passes/dft.py	55.55%	2 Missing and 2 partials ⚠️
vyper/venom/passes/function_inliner.py	85.71%	1 Missing and 1 partial ⚠️
vyper/venom/passes/sccp/sccp.py	66.66%	1 Missing and 1 partial ⚠️
vyper/venom/venom_to_assembly.py	90.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4747      +/-   ##
==========================================
- Coverage   93.23%   93.08%   -0.15%     
==========================================
  Files         137      137              
  Lines       19452    19652     +200     
  Branches     3354     3410      +56     
==========================================
+ Hits        18136    18293     +157     
- Misses        893      924      +31     
- Partials      423      435      +12     

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