Invincibility after rejoining the game

Restored the following bugs that were fixed in 24w45a:

MC-212 – Fall damage is ignored for a couple of seconds when reloading into LAN or singleplayer worlds.

MC-21650 – Player is immune to damage for a few seconds after saving the world and returning.

MC-160051 – Players can prevent fire damage by reloading world/re-joining server.

Players will have 3 seconds (60ticks) of invincibility after rejoining the game.