chore(DB): import pending files

Referenced commit(s): f6a0433297

data/sql/updates/pending_db_characters/active_arena_season.sql

@@ -1,10 +0,0 @@
-DROP TABLE IF EXISTS `active_arena_season`;
-CREATE TABLE `active_arena_season` (
-    `season_id` TINYINT UNSIGNED NOT NULL,
-    `season_state` TINYINT UNSIGNED NOT NULL COMMENT 'Supported 2 states: 0 - disabled; 1 - in progress.'
-)
-CHARSET = utf8mb4
-COLLATE = utf8mb4_unicode_ci
-ENGINE = InnoDB;
-
-INSERT INTO `active_arena_season` (`season_id`, `season_state`) VALUES (8, 1);