roachtest: schemachange/mixed-versions failed [missing version gate for UDF calling UDF] about cockroach HOT 6 CLOSED

 "workerId": 2,
 "clientTimestamp": "06:22:52.988243",
 "ops": [
  "BEGIN",
  {
   "sql": "DROP FUNCTION IF EXISTS \"NoSuchFunction\""
  },
  {
   "sql": "ALTER FUNCTION schema_w2_4.udf_w2_65(pg_catalog.int8, pg_catalog.int8) RENAME TO udf_w2_93"
  },
  {
   "sql": "CREATE FUNCTION schema_w0_59.udf_w2_94()\n\tRETURNS VOID\n\tLANGUAGE SQL\n\tAS $$ SELECT NULL WHERE (SELECT schema_w2_4.udf_w2_93(NULL,NULL) IS NOT NULL) $$"
  }
 ],
```

(mixedversion.go:592).Run: mixed-version test failure while running step 8 (run "run schemachange workload and validation in mixed version"): full command output in run_062807.784060811_n4_COCKROACHRANDOMSEED9.log: COMMAND_PROBLEM: exit status 1
test artifacts and logs in: /artifacts/schemachange/mixed-versions/run_1

(mixedversion.go:592).Run: mixed-version test failure while running step 8 (run "run schemachange workload and validation in mixed version"): full command output in run_062518.316371666_n4_COCKROACHRANDOMSEED8.log: COMMAND_PROBLEM: exit status 1
test artifacts and logs in: /artifacts/schemachange/mixed-versions/run_1

(mixedversion.go:592).Run: mixed-version test failure while running step 7 (run "run schemachange workload and validation in mixed version"): full command output in run_062338.179752037_n4_COCKROACHRANDOMSEED4.log: COMMAND_PROBLEM: exit status 1
test artifacts and logs in: /artifacts/schemachange/mixed-versions/run_1

(mixedversion.go:592).Run: mixed-version test failure while running step 9 (run "run schemachange workload and validation in mixed version"): full command output in run_062248.951156827_n4_COCKROACHRANDOMSEED4.log: COMMAND_PROBLEM: exit status 1
test artifacts and logs in: /artifacts/schemachange/mixed-versions/run_1