[k8s] Add Kubernetes support for ports #10787

Job	Run time
python-test (3.8, tests/unit_tests)	7m 51s
python-test (3.8, tests/test_cli.py)	3m 18s
python-test (3.8, tests/test_config.py)	2m 18s
python-test (3.8, tests/test_global_user_state.py)	3m 29s
python-test (3.8, tests/test_jobs.py)	2m 48s
python-test (3.8, tests/test_list_accelerators.py)	2m 27s
python-test (3.8, tests/test_optimizer_dryruns.py)	4m 51s
python-test (3.8, tests/test_optimizer_random_dag.py)	5m 30s
python-test (3.8, tests/test_storage.py)	3m 24s
python-test (3.8, tests/test_wheels.py)	3m 25s
python-test (3.8, tests/test_spot.py)	2m 56s
python-test (3.8, tests/test_yaml_parser.py)	3m 19s
	45m 36s

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