Extend QueryStability to handle IntoIterator implementations

Fix adjacent code

Fix duplicate warning; merge test into `tests/ui-fulldeps/internal-lints`

Use `rustc_middle::ty::FnSig::inputs`

Address two review comments

- https://github.com/rust-lang/rust/pull/139345#discussion_r2109006991
- https://github.com/rust-lang/rust/pull/139345#discussion_r2109058588

Use `Instance::try_resolve`

Import `rustc_middle::ty::Ty` as `Ty` rather than `MiddleTy`

Simplify predicate handling

Add more `#[allow(rustc::potential_query_instability)]` following rebase

Remove two `#[allow(rustc::potential_query_instability)]` following rebase

Address review comment

Update compiler/rustc_lint/src/internal.rs

Co-authored-by: lcnr <rust@lcnr.de>

compiler/rustc_interface/src/interface.rs

@@ -285,7 +285,9 @@ pub(crate) fn parse_check_cfg(dcx: DiagCtxtHandle<'_>, specs: Vec<String>) -> Ch
                     .expecteds
                     .entry(name.name)
                     .and_modify(|v| match v {
-                        ExpectedValues::Some(v) if !values_any_specified => {
+                        ExpectedValues::Some(v) if !values_any_specified =>
+                        {
+                            #[allow(rustc::potential_query_instability)]
                             v.extend(values.clone())
                         }
                         ExpectedValues::Some(_) => *v = ExpectedValues::Any,