Continue storage deletion when some fail #18621

Job	Run time
python-test (3.8, tests/unit_tests)	3m 16s
python-test (3.8, tests/test_api.py)	38s
python-test (3.8, tests/test_cli.py)	53s
python-test (3.8, tests/test_config.py)	37s
python-test (3.8, tests/test_global_user_state.py)	29s
python-test (3.8, tests/test_jobs.py)	35s
python-test (3.8, tests/test_list_accelerators.py)	43s
python-test (3.8, tests/test_optimizer_dryruns.py)	1m 59s
python-test (3.8, tests/test_optimizer_random_dag.py)	1m 6s
python-test (3.8, tests/test_storage.py)	31s
python-test (3.8, tests/test_wheels.py)	33s
python-test (3.8, tests/test_jobs_and_serve.py)	27s
python-test (3.8, tests/test_yaml_parser.py)	28s
	12m 15s

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