Core/Quests: Reset seasonal quests based on saved completion time and intended holiday start time

sql/updates/characters/4.3.4/2022_12_24_00_characters.sql

@@ -0,0 +1,5 @@
+ALTER TABLE `character_queststatus_seasonal` ADD `completedTime` bigint NOT NULL DEFAULT '0' AFTER `event`;
+
+UPDATE `character_queststatus_seasonal` SET `completedTime` = UNIX_TIMESTAMP();
+
+DELETE FROM `worldstates` WHERE `entry` BETWEEN 1 AND 85;