Rollup merge of #86678 - FabianWolff:issue-86667, r=jackh726

Fix garbled suggestion for missing lifetime specifier

This PR fixes #86667. The suggestion code currently checks whether there is a generic parameter that is not a synthetic `impl Trait` parameter and, if so, suggests to insert a new lifetime `'a` before that generic parameter. However, it does not make sense to insert `'a` in front of an elided lifetime parameter, since these are synthetic as well, which leads to the garbled suggestion in #86667.

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -1962,6 +1962,8 @@ impl<'tcx> LifetimeContext<'_, 'tcx> {
                                 hir::GenericParamKind::Type {
                                     synthetic: Some(hir::SyntheticTyParamKind::ImplTrait),
                                     ..
+                                } | hir::GenericParamKind::Lifetime {
+                                    kind: hir::LifetimeParamKind::Elided
                                 }
                             )
                         }) {