give EAR immunity to piston pushed entities

helps keep vanilla behavior with piston elevators

Spigot-Server-Patches/Activation-Range-Improvements.patch

@@ -21,6 +21,18 @@ index 7ac07ac07ac0..7ac07ac07ac0 100644
          public BlockPosition h() {
              return new BlockPosition(this);
          }
+diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
+index 7ac07ac07ac0..7ac07ac07ac0 100644
+--- a/src/main/java/net/minecraft/server/Entity.java
++++ b/src/main/java/net/minecraft/server/Entity.java
+@@ -0,0 +0,0 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
+             this.recalcPosition();
+         } else {
+             if (enummovetype == EnumMoveType.PISTON) {
++                this.activatedTick = MinecraftServer.currentTick + 20; // Paper
+                 long i = this.world.getTime();
+ 
+                 if (i != this.aM) {
 diff --git a/src/main/java/net/minecraft/server/EntityCreature.java b/src/main/java/net/minecraft/server/EntityCreature.java
 index 7ac07ac07ac0..7ac07ac07ac0 100644
 --- a/src/main/java/net/minecraft/server/EntityCreature.java