Detach reattach propagation fix

[ickshonpe]

Objective

Fixes #23893

Chain of events as far as I can follow it:

1. Remove a relationship from an entity E.
2. Immediately restore the relationship.
3. The on_r_removed<C, R> observer system triggered by On<Remove, R> removes the Inherited<C> component from E.
4. The on_r_inserted<C, R> observer system triggered by On<Insert, R> inserts Inherited<C> back again on E.
5. propagated_inherited queries for changes, adds (E, Inherited<C>) to to_process.
6. propagate_inherited queries for RemovedComponents<Inherited<C>>, adds (F, None) to to_process for each F descended from E.
7. Then to_process is processed.
8. The (F, None) entries are processed first, recursively removing Inherited<C> from E's descendants using deferred commands.
9. Then (E, Inherited<C>) is ignored as the defererred commands haven't been applied yet so the current inherited state matches the queued inherited state.

Solution

If an entity from RemovedComponents<Inherited<C>> has Inherited<C>, don't add its descendants to the to_process stack.

Not super confident in this change, but the new test passes and none of the old tests fail.

Testing

New test: test_detach_and_reattach_propagates_to_descendants