try not to wait for db in testing CI

yet another try to fix CI
3 jobs for 157-function-filtering in 4 minutes and 10 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build-backend #120817
k8s

00:00:25

passed build-frontend #120818
k8s

00:01:48

 
  Test
failed test-backend #120819

00:02:21

 
Name Stage Failure
failed
test-backend Test
        """Connect to the database. Assume that the connection is closed."""
# Check for invalid configurations.
self.check_settings()
# In case the previous connection was closed while in an atomic block
self.in_atomic_block = False
self.savepoint_ids = []
self.needs_rollback = False
Cleaning up file based variables
ERROR: Job failed: exit code 1