Rollup merge of #101391 - matthiaskrgr:perf0309, r=oli-obk

more clippy::perf fixes

compiler/rustc_resolve/src/diagnostics.rs

@@ -1393,7 +1393,7 @@ impl<'a> Resolver<'a> {
 
         // If only some candidates are accessible, take just them
         if !candidates.iter().all(|v: &ImportSuggestion| !v.accessible) {
-            candidates = candidates.into_iter().filter(|x| x.accessible).collect();
+            candidates.retain(|x| x.accessible)
         }
 
         candidates