Tests

Create Getting_Started_Benchmarking.md #393

Job	Run time
prelim	1s
gpu_image / Build and upload image (a100-40gb-4)	40s
tpu_image / Build and upload image (v4-8)	1m 42s
tpu_integration_tests / run	6m 28s
tpu_unit_tests / run	14m 31s
gpu_integration_tests / run	7m 56s
gpu_unit_tests / run	2m 52s
Clean up	8s
	34m 18s

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