HHH-19608 mark new Dialect operation @Incubating

Author: gavinking

hibernate-core/src/main/java/org/hibernate/dialect/Dialect.java

@@ -4634,6 +4634,7 @@ public boolean supportsPartitionBy() {
 	 *
 	 * @since 7.1
 	 */
+	@Incubating
 	public boolean addPartitionKeyToPrimaryKey() {
 		return false;
 	}