Add columns to drop list for SQL dump diff

- The final diff in the CI will still fail because `main` doesn't contain these dropped columns, but the initial diff to check that two runs produce identical data should pass

util/columns_to_drop.sql

@@ -14,6 +14,8 @@
  ALTER TABLE DATACOLLECTIONPARAMETER DROP COLUMN `MOD_TIME`;
  ALTER TABLE DATAFILE DROP COLUMN `CREATE_TIME`;
  ALTER TABLE DATAFILE DROP COLUMN `MOD_TIME`;
+ ALTER TABLE DATAFILE DROP COLUMN `DATAFILECREATETIME`;
+ ALTER TABLE DATAFILE DROP COLUMN `DATAFILEMODTIME`;
  ALTER TABLE DATAFILEFORMAT DROP COLUMN `CREATE_TIME`;
  ALTER TABLE DATAFILEFORMAT DROP COLUMN `MOD_TIME`;
  ALTER TABLE DATAFILEPARAMETER DROP COLUMN `CREATE_TIME`;