dos-run.sh: only require webhooks for scheduled runs

[t-nelson]

Problem

can't run bench-tps without reporting

Changes

only require hook(s) to be specified with SCHEDULED_RUN is set (already added to existing schedules)

[pieceofr]

Could you please clarify the meaning of "SCHEDULED_RUN"? I'm confused about its usage as there's also a "SCHEDULED RUN" in Pipeline of Buildkite. Additionally, we have multiple places where we check the webhook for the report service. If we don't want to check webhooks, should we also disable the report process?

[t-nelson]

Could you please clarify the meaning of "SCHEDULED_RUN"? I'm confused about its usage as there's also a "SCHEDULED RUN" in Pipeline of Buildkite. Additionally, we have multiple places where we check the webhook for the report service. If we don't want to check webhooks, should we also disable the report process?

SCHEDULED_RUN is just another envvar that i added to the scheduled jobs on buildkite. idea is to signal to the script that the job is scheduled and only make webhooks a hard requirement in that case