Rollup merge of #137202 - Mark-Simulacrum:interned-is-hash, r=saethlin

Enforce T: Hash for Interned<...>

This adds panicking Hash impls for several resolver types that don't actually satisfy this condition. It's not obvious to me that rustc_resolve actually upholds the Interned guarantees but fixing that seems pretty hard (the structures have at minimum some interior mutability, so it's not really recursively hashable in place...). FIXME comments as such on those impls.

cc rust-lang/rust#137196 (comment)

r? ``@saethlin``

Author: Urgau