[Lambda] Lambda Cloud SkyPilot provisioner #15845

Job	Run time
python-test (3.8, tests/unit_tests)	6m 27s
python-test (3.8, tests/test_api.py)	3m 59s
python-test (3.8, tests/test_cli.py)	4m 12s
python-test (3.8, tests/test_config.py)	3m 46s
python-test (3.8, tests/test_global_user_state.py)	3m 55s
python-test (3.8, tests/test_jobs.py)	4m 21s
python-test (3.8, tests/test_list_accelerators.py)	4m 7s
python-test (3.8, tests/test_optimizer_dryruns.py)	5m 40s
python-test (3.8, tests/test_optimizer_random_dag.py)	4m 10s
python-test (3.8, tests/test_storage.py)	3m 54s
python-test (3.8, tests/test_wheels.py)	3m 55s
python-test (3.8, tests/test_jobs_and_serve.py)	3m 55s
python-test (3.8, tests/test_yaml_parser.py)	3m 56s
	56m 17s

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