Uplift some miscellaneous coroutine-specific machinery into `check_closure`#119417

Merged

bors merged 3 commits intorust-lang:masterfrom compiler-errors:closure-checking

Jan 4, 2024

+150-141

Commits on Dec 29, 2023

No need to record movability in deferred_coroutine_interiors
compiler-errors
committed
Don't create interior type variable in check_closure
compiler-errors
committed
Compute yield and return types outside of check_fn
compiler-errors
committed