The max-run-time is ignored by beetmover payload builders.
For signingscript, 10 minutes seems to be fine except for localized
notarization jobs, which started failing after scriptworker started
taking the payload's maxRunTime into account in v61.2.0.
Original Revision: https://phabricator.services.mozilla.com/D269539
Differential Revision: https://phabricator.services.mozilla.com/D269601