Wrap default behaviour in is not none to appease pyright / pylance #391

Job	Run time
Add header lint	6s
Check Python Type Annotations	19s
Python type check (Pyright)	4m 49s
python_ruff	5s
setup	8s
test (alma9, 3.9, autotest, syntax, 1, false)	3m 41s
test (alma9, 3.9, autotest, client_syntax, false)	4m 24s
test (alma9, 3.9, autotest, client, postgres14)	4m 31s
test (alma9, 3.9, autotest, remote_dbs, oracle, influxdb_elastic)	3m 41s
test (alma9, 3.9, autotest, remote_dbs, mysql8, influxdb_elastic)	4m 31s
test (alma9, 3.9, autotest, remote_dbs, postgres14, influxdb_elastic)	4m 32s
test (alma9, 3.9, autotest, sqlite, sqlite)	3m 41s
test (alma9, 3.9, autotest, multi_vo, postgres14, /opt/rucio/etc/multi_vo/tst)	4m 31s
test (alma9, 3.10, autotest, syntax, 1, false)	4m 31s
test (alma9, 3.10, autotest, client_syntax, false)	4m 31s
test (alma9, 3.10, autotest, client, postgres14)	4m 33s
test (alma9, 3.10, autotest, remote_dbs, oracle, influxdb_elastic)	4m 32s
test (alma9, 3.10, autotest, remote_dbs, mysql8, influxdb_elastic)	4m 32s
test (alma9, 3.10, autotest, remote_dbs, postgres14, influxdb_elastic)	4m 31s
test (alma9, 3.10, autotest, sqlite, sqlite)	4m 32s
test (alma9, 3.10, autotest, multi_vo, postgres14, /opt/rucio/etc/multi_vo/tst)	4m 32s
	1h 15m 13s

Provide feedback