Auto merge of #117884 - bvanjoi:fix-117794, r=compiler-errors

skip rpit constraint checker if borrowck return type error

Fixes #117794
Fixes #117886
Fixes #119025

Prior to change #117418, the value of `concrete_opaque_types` for `mir_borrock(T::a::opaque)` was `None`. However, due to modifications in `body.local_decls`, the return value had been changed.

The changed of `body.local_decls` has let to the addition of `ty:Error` to `infcx.opaque_type_storage.opaque_types` during `TypeChecker::equate_inputs_and_outputs`. This is due to it utilizing the output of a function signature that was appended during `construct_error`(which previously only appended a `ty::Error`) and then execute `TypeChecker::Related_types`.

Therefore, in this PR, I've implemented a condition to bypass the rpit check when an error is encountered.

r? `@compiler-errors`

Author: bors