Auto merge of #119251 - Enselic:rustc_lint-query-stability, r=cjgillot

rustc_lint: Enforce `rustc::potential_query_instability` lint

Stop allowing `rustc::potential_query_instability` on all of `rustc_lint` and instead allow it on a case-by-case basis if it is safe to do so. In this particular crate, all lints were safe to allow.

Part of https://github.com/rust-lang/rust/issues/84447 which is E-help-wanted.