[Provisioner] Fix bug when using docker login config and launching without yaml #9998

Job	Run time
python-test (3.8, tests/unit_tests)	3m 7s
python-test (3.8, tests/test_cli.py)	3m 7s
python-test (3.8, tests/test_config.py)	2m 50s
python-test (3.8, tests/test_global_user_state.py)	3m 0s
python-test (3.8, tests/test_jobs.py)	3m 7s
python-test (3.8, tests/test_list_accelerators.py)	3m 1s
python-test (3.8, tests/test_optimizer_dryruns.py)	3m 6s
python-test (3.8, tests/test_optimizer_random_dag.py)	3m 6s
python-test (3.8, tests/test_storage.py)	3m 1s
python-test (3.8, tests/test_wheels.py)	2m 57s
python-test (3.8, tests/test_spot.py)	2m 56s
python-test (3.8, tests/test_yaml_parser.py)	2m 50s
	36m 8s

Provide feedback