Update key gen for 1.20.4 (#10015)

patches/api/0004-Code-Generation.patch

@@ -85,15 +85,16 @@ index 0000000000000000000000000000000000000000..2512dba27edfdccbc4430815b6cba048
 +}
 diff --git a/src/main/java/io/papermc/paper/registry/RegistryKey.java b/src/main/java/io/papermc/paper/registry/RegistryKey.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..5251f922d2d14da35f61098c11694371f591cd2a
+index 0000000000000000000000000000000000000000..c4b30b16ce4db754b958c493ad86d0863592c263
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/registry/RegistryKey.java
-@@ -0,0 +1,61 @@
+@@ -0,0 +1,67 @@
 +package io.papermc.paper.registry;
 +
 +import net.kyori.adventure.key.Keyed;
 +import org.bukkit.GameEvent;
 +import org.bukkit.block.Biome;
++import org.bukkit.generator.structure.Structure;
 +import org.bukkit.generator.structure.StructureType;
 +import org.bukkit.inventory.meta.trim.TrimMaterial;
 +import org.bukkit.inventory.meta.trim.TrimPattern;
@@ -135,17 +136,22 @@ index 0000000000000000000000000000000000000000..5251f922d2d14da35f61098c11694371
 +     * Data-driven Registries *
 +     * ********************** */
 +    /**
-+     * Data-driven registry for structure types.
++     * Data-driven registry for biomes.
 +     * @see io.papermc.paper.registry.keys.BiomeKeys
 +     */
 +    RegistryKey<Biome> BIOME = create("worldgen/biome");
 +    /**
-+     * Data-driven registry for structure types.
++     * Data-driven registry for structures.
++     * @see io.papermc.paper.registry.keys.StructureKeys
++     */
++    RegistryKey<Structure> STRUCTURE = create("worldgen/structure");
++    /**
++     * Data-driven registry for trim materials.
 +     * @see io.papermc.paper.registry.keys.TrimMaterialKeys
 +     */
 +    RegistryKey<TrimMaterial> TRIM_MATERIAL = create("trim_material");
 +    /**
-+     * Data-driven registry for structure types.
++     * Data-driven registry for trim patterns.
 +     * @see io.papermc.paper.registry.keys.TrimPatternKeys
 +     */
 +    RegistryKey<TrimPattern> TRIM_PATTERN = create("trim_pattern");