Rollup merge of #107532 - compiler-errors:erase-regions-in-uninhabited, r=jackh726

Erase regions before doing uninhabited check in borrowck

~Also, fingerprint query keys/values when debug assertions are enabled. This should make it easier to check for issues like this without `-Cincremental`, and make UI tests a bit cleaner.~ edit: moving that to a separate PR

Fixes #107505

diff --cc compiler/rustc_borrowck/src/type_check/mod.rs
Simple merge