Constructor field parameters use incorrect symbol format

[matthewnitschke-wk]

class Foo {
  final String bar;
//             ^^^ definition scip-dart pub dart_test 1.0.0 lib/main.dart/Foo#bar.
  const Foo._({required this.bar});
//                           ^^^ reference scip-dart pub dart_test 1.0.0 lib/main.dart/Foo#bar.

  static const someVal = Foo._(bar: "somestring");
//                             ^^^ reference scip-dart pub dart_test 1.0.0 lib/main.dart/Foo#_().(bar)
}

Scip analysis treats named parameters always as a "parameter" index: Foo#_().(bar), even when this is referencing a field. We need to update the symbol logic to check whether the element is referring to a field parameter, and if so, generate correctly