Or<T> should be a new type of PhantomData<T> (#8212)

# Objective

`Or<T>` should be a new type of `PhantomData<T>` instead of `T`.

## Solution

Make `Or<T>` a new type of `PhantomData<T>`.

## Migration Guide

`Or<T>` is just used as a type annotation and shouldn't be constructed.

crates/bevy_ecs/src/query/filter.rs

@@ -237,7 +237,7 @@ unsafe impl<T: Component> ReadOnlyWorldQuery for Without<T> {}
 /// }
 /// # bevy_ecs::system::assert_is_system(print_cool_entity_system);
 /// ```
-pub struct Or<T>(pub T);
+pub struct Or<T>(PhantomData<T>);
 
 #[doc(hidden)]
 pub struct OrFetch<'w, T: WorldQuery> {