Core/Commands: Add .reload vehicle_template

Port From (https://github.com/TrinityCore/TrinityCore/commit/4ca15ec065289e12ce95962b3afd89445e141a97)

sql/updates/auth/master/2020_12_31_00_auth.sql

@@ -0,0 +1,7 @@
+DELETE FROM `rbac_permissions` WHERE `id`=881;
+INSERT INTO `rbac_permissions` (`id`,`name`) VALUES
+(881, 'Command: reload vehicle_template');
+
+DELETE FROM `rbac_linked_permissions` WHERE `linkedId`=881;
+INSERT INTO `rbac_linked_permissions` (`id`,`linkedId`) VALUES
+(196,881);