Adding linear ticket requirement to PRs #1

Job	Run time
run-tests (latest, test_prod)	3m 5s
run-tests (latest, test_core)	4m 24s
run-tests (latest, test_cli)	4m 7s
run-tests (latest, test_big_modeling)	4m 6s
run-tests (latest, test_deepspeed)	5m 32s
run-tests (latest, test_fsdp)	3m 47s
run-tests (latest, test_example_differences)	4m 6s
run-tests (latest, test_checkpoint_step)	5m 22s
run-tests (latest, test_checkpoint_epoch)	5m 17s
run-tests (latest, test_rest)	10m 10s
run-tests (minimum, test_prod)	4m 31s
run-tests (minimum, test_core)	6m 9s
run-tests (minimum, test_cli)	5m 51s
run-tests (minimum, test_big_modeling)	5m 38s
run-tests (minimum, test_deepspeed)	5m 26s
run-tests (minimum, test_fsdp)	5m 23s
run-tests (minimum, test_example_differences)	5m 28s
run-tests (minimum, test_checkpoint_step)	7m 2s
run-tests (minimum, test_checkpoint_epoch)	6m 48s
run-tests (minimum, test_rest)	12m 20s
	1h 54m 32s

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