Optimise BlockState's hashCode/equals

These are singleton "single instance" objects. We can rely on
object identity checks safely.

Use a simpler optimized hashcode

paper-server/patches/sources/net/minecraft/world/level/block/state/properties/EnumProperty.java.patch

@@ -0,0 +1,12 @@
+--- a/net/minecraft/world/level/block/state/properties/EnumProperty.java
++++ b/net/minecraft/world/level/block/state/properties/EnumProperty.java
+@@ -59,8 +59,7 @@
+         return this.ordinalToIndex[enum_.ordinal()];
+     }
+ 
+-    @Override
+-    public boolean equals(Object object) {
++    public boolean equals_unused(Object object) { // Paper - Perf: Optimize hashCode/equals
+         if (this == object) {
+             return true;
+         } else {

paper-server/patches/sources/net/minecraft/world/level/block/state/properties/IntegerProperty.java.patch

@@ -0,0 +1,12 @@
+--- a/net/minecraft/world/level/block/state/properties/IntegerProperty.java
++++ b/net/minecraft/world/level/block/state/properties/IntegerProperty.java
+@@ -28,8 +28,7 @@
+         return this.values;
+     }
+ 
+-    @Override
+-    public boolean equals(Object object) {
++    public boolean equals_unused(Object object) { // Paper - Perf: Optimize hashCode/equals
+         if (this == object) {
+             return true;
+         } else {

paper-server/patches/sources/net/minecraft/world/level/block/state/properties/Property.java.patch

@@ -0,0 +1,11 @@
+--- a/net/minecraft/world/level/block/state/properties/Property.java
++++ b/net/minecraft/world/level/block/state/properties/Property.java
+@@ -72,7 +72,7 @@
+ 
+     @Override
+     public boolean equals(Object object) {
+-        return this == object || object instanceof Property<?> property && this.clazz.equals(property.clazz) && this.name.equals(property.name);
++        return this == object; // Paper - Perf: Optimize hashCode/equals
+     }
+ 
+     @Override