[sdk/python] yaml._parse_yaml_object waits for all metadata

[SharpEdgeMarshall]

yaml._parse_yaml_object waits for all metadata with pulumi.Output.from_input(metadata) instead of waiting only for name and namespace

In case you have a ConfigFile with a transformation that adds an Output object to metadata, the preview will not show the resource.

Steps to reproduce

       def add_annotation(obj, opts):
                obj["metadata"]["annotations"]["foo"] = my_output_var

        k8s.yaml.ConfigFile(
            "foo-resource",
            file="foo.yaml",
            transformations=[add_annotation],
        )

Expected: Expect to see the resource in preview
Actual: The resource is applied only during pulumi up