Implement Clone and Copy for bevy_ptr's ConstNonNull for parity with NonNull (#22078)

# Objective

Fixes #22059 

## Solution

Just `#[derive(Clone, Copy)]` on `ConstNonNull` since it`s just a
wrapper around `NonNull` which implements them

## Testing

Just tested if it compiles and functions as it should

Author: panpanpro888

crates/bevy_ptr/src/lib.rs

@@ -161,6 +161,7 @@ mod sealed {
 /// A newtype around [`NonNull`] that only allows conversion to read-only borrows or pointers.
 ///
 /// This type can be thought of as the `*const T` to [`NonNull<T>`]'s `*mut T`.
+#[derive(Clone, Copy)]
 #[repr(transparent)]
 pub struct ConstNonNull<T: ?Sized>(NonNull<T>);