Updating test expectations for DDC Set implementations. (#2458)

* Fixing Set runtime test output names in DDC

* Updating set impl enclosing library

Author: Markzipan

dwds/test/instances/common/test_inspector.dart

@@ -354,7 +354,7 @@ Matcher matchListClassRef(String type) => matchClassRef(
 Matcher matchMapClassRef(String type) =>
     matchClassRef(name: type, libraryId: _dartJsHelperLibrary);
 Matcher matchSetClassRef(String type) =>
-    matchClassRef(name: type, libraryId: _dartCollectionLibrary);
+    matchClassRef(name: type, libraryId: _dartJsHelperLibrary);
 
 Matcher matchClassRef({dynamic name, dynamic libraryId}) => isA<ClassRef>()
     .having((e) => e.name, 'class ref name', name)