Port patches from folia dev/optimisations

patches/server/Optimise-recalcBlockCounts-for-empty-sections.patch

@@ -28,10 +28,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              FluidState fluid = iblockdata.getFluidState();
  
 @@ -0,0 +0,0 @@ public class LevelChunkSection {
-             }
+             // Paper end - optimise collisions
  
          });
 +        } // Paper - do not run forEachLocation on clearly empty sections
          // Paper end
-         this.initBlockCollisionData(); // Paper
      }
+