Add TPU service and task example #3040

Job	Run time
python-lint	14s
gateway-build	0s
frontend-build	1m 6s
runner-test	2m 4s
python-test (macos-latest, 3.8)	2m 34s
python-test (macos-latest, 3.9)	1m 31s
python-test (macos-latest, 3.10)	2m 6s
python-test (macos-latest, 3.11)	2m 24s
python-test (macos-latest, 3.12)	1m 55s
python-test (ubuntu-latest, 3.8)	1m 49s
python-test (ubuntu-latest, 3.9)	3m 33s
python-test (ubuntu-latest, 3.10)	4m 17s
python-test (ubuntu-latest, 3.11)	3m 26s
python-test (ubuntu-latest, 3.12)	4m 7s
runner-compile (linux, amd64, ubuntu-latest)	14s
runner-upload	0s
generate-json-schema	0s
update-get-dstack	0s
	31m 20s

Provide feedback