Make TechHider hidden regions consistent for spectators

Spectators hid HiddenBlocks in the whole arena for block updates, but
full chunk packets outside both extend regions were sent unfiltered, so
the same blocks were hidden or visible depending on the packet type.

Hidden regions are now a list: spectators hide both team extend
regions, team members the opposite one. Block checks and the per-chunk
bypass use the same regions, so everything outside the extend regions
is visible and unfiltered.

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/AccessPrivilegeProvider.java

@@ -25,8 +25,6 @@ import net.minecraft.world.level.block.state.BlockState;
 import org.bukkit.entity.Player;
 
 public interface AccessPrivilegeProvider {
-    boolean isEveryonePrivilegedToAccessAllDataWithinChunk(int chunkX, int chunkZ);
-
     /**
      * Resolves everything that can change concurrently about this player once.
      * The result is used for all decisions of one outgoing packet (including all packets of a bundle).
@@ -41,6 +39,11 @@ public interface AccessPrivilegeProvider {
     interface ForPlayer {
         Player getPlayer();
 
+        /**
+         * @return true if nothing within this chunk is restricted for this player, so the chunk may be sent unmodified
+         */
+        boolean canAccessAllDataWithinChunk(int chunkX, int chunkZ);
+
         boolean canAccessPosition(int blockX, int blockY, int blockZ);
 
         boolean canAccessBlock(int blockX, int blockY, int blockZ, Block block);

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/TechHider.java

@@ -530,7 +530,7 @@ public class TechHider {
     }
 
     private ClientboundLevelChunkWithLightPacket processChunkWithLight(ForPlayer access, ClientboundLevelChunkWithLightPacket packet) {
-        if (privilegeProvider.isEveryonePrivilegedToAccessAllDataWithinChunk(packet.getX(), packet.getZ())) {
+        if (access.canAccessAllDataWithinChunk(packet.getX(), packet.getZ())) {
             return packet;
         } else {
             return chunkHider.processLevelChunkWithLightPacket(access, packet);