Core/Hotfixes: Add locales to hotfix_blob

Port From (https://github.com/TrinityCore/TrinityCore/commit/590f541019f7630f614110c60ce3653b17ca77e2)

sql/updates/hotfixes/master/2020_07_04_00_hotfixes.sql

@@ -0,0 +1,6 @@
+ALTER TABLE `hotfix_blob`
+ADD COLUMN `locale` VARCHAR(4) NOT NULL COLLATE 'utf8mb4_unicode_ci' AFTER `RecordId`,
+DROP PRIMARY KEY,
+ADD PRIMARY KEY (`TableHash`, `RecordId`, `locale`);
+
+UPDATE `hotfix_blob` SET `locale` = "enUS";