Restore custom InventoryHolder support

Upstream removed the ability to consistently use a custom InventoryHolder,
However, the implementation does not use an InventoryHolder in any form
outside of custom inventories.

== AT ==
public-f net.minecraft.world.inventory.AbstractContainerMenu dataSlots
public-f net.minecraft.world.inventory.AbstractContainerMenu remoteDataSlots

Co-authored-by: Shane Freeder <theboyetronic@gmail.com>

paper-server/src/main/java/io/papermc/paper/inventory/PaperInventoryCustomHolderContainer.java

@@ -0,0 +1,141 @@
+package io.papermc.paper.inventory;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
+import net.minecraft.world.Container;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.block.entity.BaseContainerBlockEntity;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.event.inventory.InventoryType;
+import org.bukkit.inventory.InventoryHolder;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
+import java.util.List;
+
+@DefaultQualifier(NonNull.class)
+public final class PaperInventoryCustomHolderContainer implements Container {
+
+    private final InventoryHolder owner;
+    private final Container delegate;
+    private final InventoryType type;
+    private final String title;
+    private final Component adventure$title;
+
+    public PaperInventoryCustomHolderContainer(InventoryHolder owner, Container delegate, InventoryType type) {
+        this.owner = owner;
+        this.delegate = delegate;
+        this.type = type;
+        @Nullable Component adventure$title = null;
+        if (delegate instanceof BaseContainerBlockEntity blockEntity) {
+            adventure$title = blockEntity.getCustomName() != null ? PaperAdventure.asAdventure(blockEntity.getCustomName()) : null;
+        }
+        if (adventure$title == null) {
+            adventure$title = type.defaultTitle();
+        }
+        this.adventure$title = adventure$title;
+        this.title = LegacyComponentSerializer.legacySection().serialize(this.adventure$title);
+    }
+
+    public Component title() {
+        return this.adventure$title;
+    }
+
+    public String getTitle() {
+        return this.title;
+    }
+
+    public InventoryType getType() {
+        return this.type;
+    }
+
+    @Override
+    public int getContainerSize() {
+        return this.delegate.getContainerSize();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return this.delegate.isEmpty();
+    }
+
+    @Override
+    public ItemStack getItem(int slot) {
+        return this.delegate.getItem(slot);
+    }
+
+    @Override
+    public ItemStack removeItem(int slot, int amount) {
+        return this.delegate.removeItem(slot, amount);
+    }
+
+    @Override
+    public ItemStack removeItemNoUpdate(int slot) {
+        return this.delegate.removeItemNoUpdate(slot);
+    }
+
+    @Override
+    public void setItem(int slot, ItemStack stack) {
+        this.delegate.setItem(slot, stack);
+    }
+
+    @Override
+    public int getMaxStackSize() {
+        return this.delegate.getMaxStackSize();
+    }
+
+    @Override
+    public void setChanged() {
+        this.delegate.setChanged();
+    }
+
+    @Override
+    public boolean stillValid(Player player) {
+        return this.delegate.stillValid(player);
+    }
+
+    @Override
+    public List<ItemStack> getContents() {
+        return this.delegate.getContents();
+    }
+
+    @Override
+    public void onOpen(CraftHumanEntity who) {
+        this.delegate.onOpen(who);
+    }
+
+    @Override
+    public void onClose(CraftHumanEntity who) {
+        this.delegate.onClose(who);
+    }
+
+    @Override
+    public List<HumanEntity> getViewers() {
+        return this.delegate.getViewers();
+    }
+
+    @Override
+    public InventoryHolder getOwner() {
+        return this.owner;
+    }
+
+    @Override
+    public void setMaxStackSize(int size) {
+        this.delegate.setMaxStackSize(size);
+    }
+
+    @Override
+    public Location getLocation() {
+        return this.delegate.getLocation();
+    }
+
+    @Override
+    public void clearContent() {
+        this.delegate.clearContent();
+    }
+}