remove backtics from postgresql migrations (#4968)

migrations/postgresql/2024-09-04-091351_use_device_type_for_mails/down.sql

@@ -1 +1 @@
-ALTER TABLE `twofactor_incomplete` DROP COLUMN `device_type`;
+ALTER TABLE twofactor_incomplete DROP COLUMN device_type;

migrations/postgresql/2024-09-04-091351_use_device_type_for_mails/up.sql

@@ -1 +1 @@
-ALTER TABLE `twofactor_incomplete` ADD COLUMN `device_type` INTEGER NOT NULL;
+ALTER TABLE twofactor_incomplete ADD COLUMN device_type INTEGER NOT NULL;