InheritingContainer.typeParameters stores type parameter with a bound under wrong name #4302

@reflectiveTest
class TypeParametersTest extends Co19TestBase {
  void test_typeParameter() async {
    var library = await bootPackageWithLibrary('''
class C<U extends num> {}
''');
    var c = library.classes.named('C');
    print(c.typeParameters.named('U extends num').documentation); // Ok
    print(c.typeParameters.named('U').documentation); // Bad state: No TypeParameter elements named 'U'
  }
}