feat(gcf-utils): add an oicd token of the task caller service account (#3346)
feat(gcf-utils): add an oicd token of the task caller service account (#3346)

* feat(gcf-utils): add an oicd token of the task caller service account

towards #3344

I'll test this with the canary bot.

* chore: lint fix
googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots