fix: fix hydra_client pk change mysql down migration
-ALTER TABLE hydra_client RENAME pk TO pk_tmp;
+ALTER TABLE hydra_client DROP PRIMARY KEY, ADD PRIMARY KEY (pk_deprecated);
+ALTER TABLE hydra_client DROP KEY pk_deprecated;
+ALTER TABLE hydra_client DROP pk;
ALTER TABLE hydra_client CHANGE COLUMN pk_deprecated pk INT UNSIGNED AUTO_INCREMENT;
-ALTER TABLE hydra_client DROP PRIMARY KEY, ADD PRIMARY KEY (pk);
-ALTER TABLE hydra_client DROP pk_tmp;
