resource/alicloud_ecs_snapshot: Refactored the resource alicloud_ecs_snapshot; Added the field create_time, region_id; Removed the ForceNew for field resource_group_id

resource/alicloud_ecs_snapshot: Refactored the resource alicloud_ecs_snapshot; Added the field create_time, region_id; Removed the ForceNew for field resource_group_id #15169