Auto merge of #123508 - WaffleLapkin:never-type-2024, r=compiler-errors

Edition 2024: Make `!` fall back to `!`

This PR changes never type fallback to be `!` (the never type itself) in the next, 2024, edition.

This makes the never type's behavior more intuitive (in 2024 edition) and is the first step of the path to stabilize it.

r? `@compiler-errors`