fix: add runtime hints for trace #4812

Job	Run time
integrationTests (bigquery)	28m 9s
integrationTests (cloudsql)	23m 44s
integrationTests (config)	19m 59s
integrationTests (datastore)	22m 14s
integrationTests (firestore)	24m 57s
integrationTests (kms)	52m 9s
integrationTests (logging)	19m 59s
integrationTests (metrics)	29m 37s
integrationTests (multisample)	26m 10s
integrationTests (kotlin)	22m 59s
integrationTests (pubsub)	33m 24s
integrationTests (pubsub-bus)	26m 25s
integrationTests (pubsub-docs)	25m 20s
integrationTests (pubsub-emulator)	21m 50s
integrationTests (pubsub-integration)	24m 34s
integrationTests (secretmanager)	22m 57s
integrationTests (spanner)	26m 50s
integrationTests (storage)	24m 29s
integrationTests (trace)	24m 29s
integrationTests (vision)	26m 20s
	8h 46m 35s

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