Use teleportAsync for handling cancelled move events

Some plugins are bad and update the `from` position to something
completely garbage. To avoid a crash from this cross-region
teleportation, the teleportAsync function is now used.

The reason the teleport isn't simply ignored is since there may
be legitimate reasons to update the `from` position to something
off-region. This also handles the case where the plugin _uses_
an asynchronous teleport while cancelling the event.

This mirrors the behavior for changing the target destination
but not cancelling the event.

Fixes https://github.com/PaperMC/Folia/issues/115

patches/server/0003-Threaded-Regions.patch

@@ -16430,7 +16430,7 @@ index 44d99e89226adb6234b9405f25ac9dab9bd84297..072634e26d32ca0b3438a5d3a03be367
                  Collections.shuffle( this.connections );
              }
 diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
-index d9c2d06ae24dcf80a497e75f4c7f63d401b77f9b..e7760d8a1013a0106effbdb7f9991e44b95359c4 100644
+index d9c2d06ae24dcf80a497e75f4c7f63d401b77f9b..f405b376c313ef297b47191e25c43ad90813f673 100644
 --- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
 +++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
 @@ -325,10 +325,10 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
@@ -16580,6 +16580,15 @@ index d9c2d06ae24dcf80a497e75f4c7f63d401b77f9b..e7760d8a1013a0106effbdb7f9991e44
  
                  ++this.receivedMovePacketCount;
                  int i = this.receivedMovePacketCount - this.knownMovePacketCount;
+@@ -759,7 +773,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
+ 
+                         // If the event is cancelled we move the player back to their old location.
+                         if (event.isCancelled()) {
+-                            this.teleport(from);
++                            this.player.getBukkitEntity().teleportAsync(from, PlayerTeleportEvent.TeleportCause.PLUGIN); // Folia - region threading
+                             return;
+                         }
+ 
 @@ -767,7 +781,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
                          // there to avoid any 'Moved wrongly' or 'Moved too quickly' errors.
                          // We only do this if the Event was not cancelled.
@@ -16688,6 +16697,15 @@ index d9c2d06ae24dcf80a497e75f4c7f63d401b77f9b..e7760d8a1013a0106effbdb7f9991e44
  
                              if (i > Math.max(this.allowedPlayerTicks, 5)) {
                                  ServerGamePacketListenerImpl.LOGGER.debug("{} is sending move packets too frequently ({} packets since last tick)", this.player.getName().getString(), i);
+@@ -1608,7 +1635,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
+ 
+                                         // If the event is cancelled we move the player back to their old location.
+                                         if (event.isCancelled()) {
+-                                            this.teleport(from);
++                                            this.player.getBukkitEntity().teleportAsync(from, PlayerTeleportEvent.TeleportCause.PLUGIN); // Folia - region threading
+                                             return;
+                                         }
+ 
 @@ -1616,7 +1643,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
                                          // there to avoid any 'Moved wrongly' or 'Moved too quickly' errors.
                                          // We only do this if the Event was not cancelled.

patches/server/0010-Work-around-https-github.com-PaperMC-paperweight-iss.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Work around https://github.com/PaperMC/paperweight/issues/194
 
 
 diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
-index e7760d8a1013a0106effbdb7f9991e44b95359c4..82ffef34b596a98faa245ba401e67add9d9ac7d0 100644
+index f405b376c313ef297b47191e25c43ad90813f673..ace5e9900eb4e08ace4fb24ffa66c6d6d03ab82a 100644
 --- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
 +++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
 @@ -504,7 +504,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic