Preserve velocity for fireball (#10934)

patches/server/Fix-Entity-Teleportation-and-cancel-velocity-if-tele.patch

@@ -56,6 +56,18 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          this.setPosRaw(x, y, z);
          this.setYRot(yaw);
          this.setXRot(pitch);
+diff --git a/src/main/java/net/minecraft/world/entity/boss/enderdragon/phases/DragonStrafePlayerPhase.java b/src/main/java/net/minecraft/world/entity/boss/enderdragon/phases/DragonStrafePlayerPhase.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/entity/boss/enderdragon/phases/DragonStrafePlayerPhase.java
++++ b/src/main/java/net/minecraft/world/entity/boss/enderdragon/phases/DragonStrafePlayerPhase.java
+@@ -0,0 +0,0 @@ public class DragonStrafePlayerPhase extends AbstractDragonPhaseInstance {
+                         }
+ 
+                         DragonFireball dragonFireball = new DragonFireball(this.dragon.level(), this.dragon, vec34.normalize());
++                        dragonFireball.preserveMotion = true; // Paper - Fix Entity Teleportation and cancel velocity if teleported
+                         dragonFireball.moveTo(o, p, q, 0.0F, 0.0F);
+                         if (new com.destroystokyo.paper.event.entity.EnderDragonShootFireballEvent((org.bukkit.entity.EnderDragon) dragon.getBukkitEntity(), (org.bukkit.entity.DragonFireball) dragonFireball.getBukkitEntity()).callEvent()) // Paper - EnderDragon Events
+                         this.dragon.level().addFreshEntity(dragonFireball);
 diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -81,3 +93,15 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          // SPIGOT-619: Force sync head rotation also
          this.entity.setYHeadRot(location.getYaw());
  
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+@@ -0,0 +0,0 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
+             }
+ 
+             ((AbstractHurtingProjectile) launch).projectileSource = this;
++            launch.preserveMotion = true; // Paper - Fix Entity Teleportation and cancel velocity if teleported
+             launch.moveTo(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
+         } else if (LlamaSpit.class.isAssignableFrom(projectile)) {
+             Location location = this.getEyeLocation();