Indented Block Position Bug

[AryazE]

When using PositionProvider on an IndentedBlock I expect to get the code range of the whole indented block.
However, if the indented block starts with a FunctionDef which has decorators, the indented block's code range also starts after the decorators, where the function definition starts.
I have added the following test to libcst/metadata/tests/test_position_provider.py under class PositionProviderTest and it fails.

    def test_indented_block_starting_with_decorated_function_def(self) -> None:
        """
        Tests that the position provider correctly computes positions in an indented block
        starting with a decorated function definition.
        """
        test = self

        class IndentedBlockVisitor(CSTVisitor):
            METADATA_DEPENDENCIES = (PositionProvider,)

            def visit_IndentedBlock(self, node: cst.IndentedBlock) -> None:
                test.assertEqual(
                    self.get_metadata(PositionProvider, node),
                    CodeRange((2, 4), (4, 15)),
                )

        wrapper = MetadataWrapper(
            parse_module("def foo():\n    @decorator\n    def func(): return 42\n    return func")
        )
        wrapper.visit(IndentedBlockVisitor())