Fix order by types to allow enums

[CarsonF]

No description provided.

[scotttrinh]

Do you mind adding a simple test for this? I think you can add an order_by: movie.genre to

edgedb-js/integration-tests/lts/select.test.ts

Lines 1049 to 1057 in 18f0351

	const query = e.select(e.Movie, (movie) => ({
	title: true,
	characters: (char) => ({
	name: true,
	order_by: char.name,
	...e.is(e.Hero, { secret_identity: true }),
	}),
	filter_single: e.op(movie.title, "=", "The Avengers"),
	}));

[CarsonF]

That ok?