[Azure] SkyPilot provisioner for Azure #15254

Job	Run time
python-test (3.8, tests/unit_tests)	5m 45s
python-test (3.8, tests/test_api.py)	3m 27s
python-test (3.8, tests/test_cli.py)	3m 34s
python-test (3.8, tests/test_config.py)	3m 21s
python-test (3.8, tests/test_global_user_state.py)	3m 12s
python-test (3.8, tests/test_jobs.py)	3m 48s
python-test (3.8, tests/test_list_accelerators.py)	3m 26s
python-test (3.8, tests/test_optimizer_dryruns.py)	5m 3s
python-test (3.8, tests/test_optimizer_random_dag.py)	3m 44s
python-test (3.8, tests/test_storage.py)	3m 19s
python-test (3.8, tests/test_wheels.py)	3m 16s
python-test (3.8, tests/test_jobs_and_serve.py)	3m 15s
python-test (3.8, tests/test_yaml_parser.py)	3m 9s
	48m 19s

Provide feedback