Define owners for UpdateForV9 annotations (#113926)

In order to better track the work needed to prepare this branch for the
major version upgrade, this commit adds a mandatory `owner` field to all
`UpdateForV9` (and `UpdateForV10`) annotations.

libs/core/src/main/java/org/elasticsearch/core/RestApiVersion.java

@@ -22,7 +22,7 @@ public enum RestApiVersion {
 
     V_8(8),
 
-    @UpdateForV9 // remove all references to V_7 then delete this annotation
+    @UpdateForV9(owner = UpdateForV9.Owner.CORE_INFRA) // remove all references to V_7 then delete this annotation
     V_7(7);
 
     public final byte major;

libs/core/src/main/java/org/elasticsearch/core/UpdateForV10.java

@@ -21,4 +21,22 @@ import java.lang.annotation.Target;
 @Retention(RetentionPolicy.SOURCE)
 @Target({ ElementType.LOCAL_VARIABLE, ElementType.CONSTRUCTOR, ElementType.FIELD, ElementType.METHOD, ElementType.TYPE })
 public @interface UpdateForV10 {
+    enum Owner {
+        CORE_INFRA,
+        DATA_MANAGEMENT,
+        DISTRIBUTED_COORDINATION,
+        DISTRIBUTED_INDEXING,
+        ENTERPRISE_SEARCH,
+        MACHINE_LEARNING,
+        PROFILING,
+        SEARCH_ANALYTICS,
+        SEARCH_FOUNDATIONS,
+        SEARCH_RELEVANCE,
+        SECURITY,
+    }
+
+    /**
+     * The owning team of the task to act on this annotation when the time comes.
+     */
+    Owner owner();
 }

libs/core/src/main/java/org/elasticsearch/core/UpdateForV9.java

@@ -21,4 +21,22 @@ import java.lang.annotation.Target;
 @Retention(RetentionPolicy.SOURCE)
 @Target({ ElementType.LOCAL_VARIABLE, ElementType.CONSTRUCTOR, ElementType.FIELD, ElementType.METHOD, ElementType.TYPE })
 public @interface UpdateForV9 {
+    enum Owner {
+        CORE_INFRA,
+        DATA_MANAGEMENT,
+        DISTRIBUTED_COORDINATION,
+        DISTRIBUTED_INDEXING,
+        ENTERPRISE_SEARCH,
+        MACHINE_LEARNING,
+        PROFILING,
+        SEARCH_ANALYTICS,
+        SEARCH_FOUNDATIONS,
+        SEARCH_RELEVANCE,
+        SECURITY,
+    }
+
+    /**
+     * The owning team of the task to act on this annotation when the time comes.
+     */
+    Owner owner();
 }