`prefer_const_constructors` : False positive on factory constructor for generic type

[khoadng]

Describe the issue When initialize an object with default value using factory constructor, warning will be showed. However if I add the const keyword, the code will fail to compile. Remove the type will result in runtime error.

To Reproduce

class Foo<T> {
  const Foo({
    required this.list,
  });

  // prefer_const_constructors warning here 
  factory Foo.bar() => Foo(
        list: <T>[],
      );

  Foo<T> copyWith({
    List<T>? list,
  }) => Foo(list: list ?? this.list);

  final List<T> list;
}

Expected behavior No warning

Additional context If I left out the type and apply the suggestion, the warning will disappear but it will result in error in the below case

void main() {
  final foo = Foo<int>.bar();
  // Unhandled Exception: type 'List<int>' is not a subtype of type 'List<Never>?' of 'list'
  final _ = foo.copyWith(list: [1, 2, 3]);
}

[khoadng]

Another false positive in this case also.

• prefer_const_literals_to_create_immutables

  @immutable
  class Foo<T> {
  const Foo({
  required this.list,
  });
  
  // ignore: prefer_const_constructors
  factory Foo.bar() => Foo(
      list: <T>[], // prefer_const_literals_to_create_immutables
    );
  
  Foo<T> copyWith({
  List<T>? list,
  }) =>
    Foo(list: list ?? this.list);
  
  final List<T> list;
  }

[srawlins]

This is a duplicate (or near enough) of https://github.com/dart-lang/linter/issues/1629