Fix `ItemSlotSystem` popup Logic (#28856)

Fix `ItemSlotSystem` popup Logic (#28856)

* move popup call out of `CanInsert` into `OnInteractUsing`

* im stupid and `reason` is completely unnecessary

Signed-off-by: Brandon Li <sirbrandonthenerd@gmail.com>
* return early when `itemSlots.Slots.Count == 0`

* tweak logic for triggering popups

* change popup logic again

* Consolidate whitelist check

* Get any popup message not just last failed slot

* Apply suggestions from code review

Co-authored-by: chromiumboy <50505512+chromiumboy@users.noreply.github.com>
* yoink

Co-authored-by: ShadowCommander <10494922+ShadowCommander@users.noreply.github.com>
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Signed-off-by: Brandon Li <sirbrandonthenerd@gmail.com>
Co-authored-by: ShadowCommander <10494922+ShadowCommander@users.noreply.github.com>
Co-authored-by: chromiumboy <50505512+chromiumboy@users.noreply.github.com>