fix(Core/playercreateinfo_item): Alter amount of allowed items (#3122)

* Change table `amount` to SMALLINT Unsigned

* Add a note column

* Remove deprecated item

data/sql/updates/pending_db_world/rev_1591992052509403400.sql

@@ -0,0 +1,7 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1591992052509403400');
+
+DELETE FROM `playercreateinfo_item` WHERE `itemid` = 40582 AND `amount` = -1;
+
+ALTER TABLE `playercreateinfo_item`
+	CHANGE `amount` `amount` SMALLINT UNSIGNED NOT NULL DEFAULT 1,
+	ADD `Note` VARCHAR(255) AFTER `amount`;