Predict dumping (#32394)

* Predict dumping

- This got soaped really fucking hard.
- Dumping is predicted, this required disposals to be predicte.d
- Disposals required mailing (because it's tightly coupled), and a smidge of other content systems.
- I also had to fix a compnetworkgenerator issue at the same time so it wouldn't mispredict.

* Fix a bunch of stuff

* nasty merge

* Some reviews

* Some more reviews while I stash

* Fix merge

* Fix merge

* Half of review

* Review

* re(h)f

* lizards

* feexes

* feex

Content.Shared/Containers/SharedThrowInsertContainerSystem.cs

@@ -0,0 +1,8 @@
+namespace Content.Shared.Containers;
+
+/// <summary>
+/// Sent before the insertion is made.
+/// Allows preventing the insertion if any system on the entity should need to.
+/// </summary>
+[ByRefEvent]
+public record struct BeforeThrowInsertEvent(EntityUid ThrownEntity, bool Cancelled = false);