Only propagate transforms entities with GlobalTransforms. (#14384)

# Objective
Fixes a performance issue when you have 1000s of entities in a bevy
hierarchy without transforms.

This was prominently happening in `bevy_ecs_tilemap`.

## Solution

Filter out entities that don't have a global transform.

## Testing

CI
We should test some other way...

## Migration Guide

- To avoid surprising performance pitfalls, `Transform` /
`GlobalTransform` propagation is no longer performed down through
hierarchies where intermediate parent are missing a `GlobalTransform`.
To restore the previous behavior, add `GlobalTransform::default` to
intermediate entities.

crates/bevy_transform/src/systems.rs

@@ -53,7 +53,7 @@ pub fn propagate_transforms(
     >,
     mut orphaned: RemovedComponents<Parent>,
     transform_query: Query<(Ref<Transform>, &mut GlobalTransform, Option<&Children>), With<Parent>>,
-    parent_query: Query<(Entity, Ref<Parent>)>,
+    parent_query: Query<(Entity, Ref<Parent>), With<GlobalTransform>>,
     mut orphaned_entities: Local<Vec<Entity>>,
 ) {
     orphaned_entities.clear();
@@ -114,7 +114,7 @@ unsafe fn propagate_recursive(
         (Ref<Transform>, &mut GlobalTransform, Option<&Children>),
         With<Parent>,
     >,
-    parent_query: &Query<(Entity, Ref<Parent>)>,
+    parent_query: &Query<(Entity, Ref<Parent>), With<GlobalTransform>>,
     entity: Entity,
     mut changed: bool,
 ) {