[1.21.3] Add remove count context to ItemSmeltedEvent and fix firing multiple times with shift-click

[dhyces]

Closes #1367.

This PR does two different things in regard to the event.

1. Moves the event firing up above the removeCount and passes it as an integer field for context on how much of the item stack was removed, since the item stack given in the event is only representative of the stack that was present in the slot before splitting it.
2. Adds a guard around the hook call to only fire if the removeCount is not zero. This is because AbstractFurnaceMenu#quickMoveStack calls Slot#onTake for the result slot while also earlier calling Slot#onQuickCraft. FurnaceResultSlot calls checkTakeAchievements for both onTake and onQuickCraft, which would fire the event twice.

This is up for review now, though it should be merged during the next BC window due to mods with custom furnaces/machines more than likely calling the event hook themselves.

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

[neoforged-compatibility-checks]

@dhyces, this PR introduces breaking changes.
Fortunately, this project is currently accepting breaking changes, but if they are not intentional, please revert them.
Last checked commit: 3384671d6ef724aa49245b0bbc716f8d957121bb.

neoforge (:neoforge)

• net/neoforged/neoforge/event/entity/player/PlayerEvent$ItemSmeltedEvent
  • <init>(Lnet/minecraft/world/entity/player/Player;Lnet/minecraft/world/item/ItemStack;)V: ❗ API method was removed
• net/neoforged/neoforge/event/EventHooks
  • firePlayerSmeltedEvent(Lnet/minecraft/world/entity/player/Player;Lnet/minecraft/world/item/ItemStack;)V: ❗ API method was removed

[Tslat]

@dhyces bump for 1.21.23

[neoforged-releases]

🚀 This PR has been released as NeoForge version 21.3.24-beta.