Dynamic Constant Substitution in Inlining + Use Editor for Phi Elim

• Dynamic Constant Substitution in Inlining, should be complete, relatively straightforward to implement.
• Use editor API for phi elimination, also use faster worklist algorithm.

requested review from @aaronjc4

assigned to @rarbore2

added 5 commits

• 01fe9df9...72932feb - 4 commits from branch main
• 563648a0 - Merge remote-tracking branch 'origin/main' into use_editor1

Compare with previous version

added 3 commits

• 563648a0...f4159073 - 2 commits from branch main
• 842b03c3 - Merge remote-tracking branch 'origin/main' into use_editor1

Compare with previous version

merged

mentioned in commit 0d64568f