Fix incorrect new blockdata in EntityChangeBlockEvent (#9445)

Also fixes EntityBreakDoorEvent not having the correct 'to' block data

Also standardizes how to handle EntityChangeBlockEvent before a removeBlock or destroyBlock
call. Always use 'state.getFluidState().createLegacyBlock()' to get the new state instead of
just using the 'air' state.

patches/api/0377-Added-byte-array-serialization-deserialization-for-P.patch

@@ -0,0 +1,50 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nex <nex@bits.team>
+Date: Thu, 24 Feb 2022 16:28:08 +0100
+Subject: [PATCH] Added byte array serialization/deserialization for
+ PersistentDataContainers
+
+
+diff --git a/src/main/java/org/bukkit/persistence/PersistentDataContainer.java b/src/main/java/org/bukkit/persistence/PersistentDataContainer.java
+index eebb3da156e2d95efbe22d4afa470b977ce19f10..57609b7793122e135fa0c3b926500849379637b2 100644
+--- a/src/main/java/org/bukkit/persistence/PersistentDataContainer.java
++++ b/src/main/java/org/bukkit/persistence/PersistentDataContainer.java
+@@ -164,5 +164,38 @@ public interface PersistentDataContainer {
+      * @throws NullPointerException if the key to look up is null
+      */
+     boolean has(@NotNull NamespacedKey key);
++
++    /**
++     * Serialize this {@link PersistentDataContainer} instance to a
++     * byte array.
++     *
++     * @return a binary representation of this container
++     * @throws java.io.IOException if we fail to write this container to a byte array
++     */
++    byte @NotNull [] serializeToBytes() throws java.io.IOException;
++
++    /**
++     * Read values from a serialised byte array into this
++     * {@link PersistentDataContainer} instance.
++     *
++     * @param bytes the byte array to read from
++     * @param clear if true, this {@link PersistentDataContainer} instance
++     *              will be cleared before reading
++     * @throws java.io.IOException if the byte array has an invalid format
++     */
++    void readFromBytes(byte @NotNull [] bytes, boolean clear) throws java.io.IOException;
++
++    /**
++     * Read values from a serialised byte array into this
++     * {@link PersistentDataContainer} instance.
++     * This method has the same effect as
++     * <code>PersistentDataContainer#readFromBytes(bytes, true)</code>
++     *
++     * @param bytes the byte array to read from
++     * @throws java.io.IOException if the byte array has an invalid format
++     */
++    default void readFromBytes(byte @NotNull [] bytes) throws java.io.IOException {
++        this.readFromBytes(bytes, true);
++    }
+     // Paper end
+ }