ExperienceOrbs API for Reason/Source/Triggering player

Adds lots of information about why this orb exists.

Replaces isFromBottle() with logic that persists entity reloads too.

paper-server/patches/sources/net/minecraft/server/level/ServerPlayerGameMode.java.patch

@@ -283,7 +283,7 @@
 +
 +                // Drop event experience
 +                if (flag && event != null) {
-+                    iblockdata.getBlock().popExperience(this.level, pos, event.getExpToDrop());
++                    iblockdata.getBlock().popExperience(this.level, pos, event.getExpToDrop(), this.player); // Paper
 +                }
 +
 +                return true;