Rollup merge of #130275 - compiler-errors:extern-crate, r=lcnr

Don't call `extern_crate` when local crate name is the same as a dependency and we have a trait error

#124944 implemented logic to point out when a trait bound failure involves a *trait* and *type* who come from identically named but different crates. This logic calls the `extern_crate` query which is not valid on `LOCAL_CRATE` cnum, so let's filter that out eagerly.

Fixes #130272
Fixes #129184

compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs

@@ -1669,6 +1669,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
             let name = self.tcx.crate_name(trait_def_id.krate);
             let spans: Vec<_> = [trait_def_id, found_type]
                 .into_iter()
+                .filter(|def_id| def_id.krate != LOCAL_CRATE)
                 .filter_map(|def_id| self.tcx.extern_crate(def_id.krate))
                 .map(|data| {
                     let dependency = if data.dependency_of == LOCAL_CRATE {