Rollup merge of #107422 - Nilstrieb:erase-the-ice, r=compiler-errors

Also erase substs for new infcx in pin move error

The code originally correctly erased the regions of the type it passed to the newly created infcx. But after the `fn_sig` query was made to return an `EarlyBinder<T>`, some substs that were around were substituted there without erasing their regions. They were then passed into the newly cerated infcx, which caused the ICE.

Fixes #107419

r? compiler-errors who reviewed the original PR adding this diagnostic