Core/Movement: implement cyclic spline database support

sql/updates/world/4.3.4/2020_09_20_01_world.sql

@@ -0,0 +1,7 @@
+ALTER TABLE `creature_addon`   
+	CHANGE `path_id` `waypointPathId` INT(10) UNSIGNED DEFAULT 0 NOT NULL,
+	ADD COLUMN `cyclicSplinePathId` INT(10) UNSIGNED DEFAULT 0 NOT NULL AFTER `waypointPathId`;
+
+ALTER TABLE `creature_template_addon`   
+	CHANGE `path_id` `waypointPathId` INT(10) UNSIGNED DEFAULT 0 NOT NULL,
+	ADD COLUMN `cyclicSplinePathId` INT(10) UNSIGNED DEFAULT 0 NOT NULL AFTER `waypointPathId`;