Cannot deserialize Vec3 in Resources

[mrchantey]

Bevy version

0.15.0-dev - rev 0c959f77007c29eead7f902bddd3342a1ecbca20

What you did

Attempted to serialize and then deserialize a resource with a Vec3

What went wrong

A Vec3 is serialized as a 'list' in components but a 'map' in resources. Issue is constistent in both ron and serde_json

(
  resources: {
    "test::MyType": ((
      x: 1.0,
      y: 2.0,
      z: 3.0,
    )),
  },
  entities: {
    4294967296: (
      components: {
        "test::MyType": ((1.0, 2.0, 3.0)),
      },
    ),
  },
)

Full Reproducable

#[cfg(test)]
mod test {
	use anyhow::Result;
	use bevy::prelude::*;
	use bevy::reflect::erased_serde::__private::serde::de::DeserializeSeed;
	use bevy::scene::ron;
	use bevy::scene::serde::SceneDeserializer;
	use bevy::scene::serde::SceneSerializer;

	#[derive(Resource, Component, Reflect)]
	#[reflect(Resource, Component)]
	struct MyType(pub Vec3);

	#[test]
	fn works() -> Result<()> {
		let mut app = App::new();
		app.register_type::<MyType>();

		app.insert_resource(MyType(Vec3::new(1., 2., 3.)));
		let entity = app.world_mut().spawn(MyType(Vec3::new(1., 2., 3.))).id();

		let world = app.world();

		let scene = DynamicSceneBuilder::from_world(world)
			.extract_resources()
			.extract_entities(vec![entity].into_iter())
			.build();

		let registry = app.world().resource::<AppTypeRegistry>().read();
		let serializer = SceneSerializer::new(&scene, &registry);

		let str = ron::ser::to_string_pretty(&serializer, Default::default())?;

		
		let mut deserializer = ron::de::Deserializer::from_str(&str)?;
		
		println!("{}", str);
		SceneDeserializer {
			type_registry: &registry,
		}
		.deserialize(&mut deserializer)?;

		Ok(())
	}
}

Additional information

Possibly related to #15174, some discussion in discord here