feat[venom]: tune function inliner

[charles-cooper]

this commit tunes the function inliner by assigning param and ret instructions a cost of 0 (in fact, they should probably have negative cost, since those only have cost in the call convention overhead, but when inlined, they disappear).

What I did

How I did it

How to verify it

Commit message

Commit message for the final, squashed PR. (Optional, but reviewers will appreciate it! Please see our commit message style guide for what we would ideally like to see in a commit message.)

Description for the changelog

Cute Animal Picture

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.67%. Comparing base (79001f3) to head (77a8349).
Report is 78 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4584      +/-   ##
==========================================
+ Coverage   92.64%   92.67%   +0.03%     
==========================================
  Files         122      122              
  Lines       17530    17537       +7     
  Branches     2980     2981       +1     
==========================================
+ Hits        16240    16252      +12     
+ Misses        892      888       -4     
+ Partials      398      397       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.