A list of things that will need to be fixed before the work can be considered functional:

1. genPoisonFrame implementation.
2. Stack alignment in lvaAlignFrame.
3. [Wasm RyuJit] local stores #122390 - remove code from STORE_LCL_VAR codegen that deals with non-candidates, add asserts to such effect.
   • Once we have some minimal RA.
4. Fix untracked debug scopes in siOpenScopesForNonTrackedVars.
   • [Wasm RyuJit] Fixes for some issues in codegen bringup tests #122483
5. Remove #ifdef TARGET_WASM from the JMC insertion path since once we have proper WASM CG2 collections and/or call emit support.
   • [Wasm RyuJit] Fixes for some issues in codegen bringup tests #122483
6. Fix the single-IG restriction of the prolog so that we don't need to worry about methods with a large number of non-enregistered arguments overflowing it. Ref: [RyuJit/WASM] Establish SP & FP and home register arguments #123270.

Part of #121208.