[Notifications] notifications do not trigger until workflows are run

[eric-k256]

When PRs from new submitters are created, the pr-subscribers-* notification comment is not created until someone with write permissions approves the GitHub workflow to run.

I don't know if there is a way around this using workflows, but it leads to a situation where no one knows to run the workflow because the subscribers haven't been tagged/notified.

See #68509 as an example, with the PR 10 hours ago, and no comment until just now when I clicked the 'Approve and Run' button in the GitHub UI.

[llvmbot]

@llvm/issue-subscribers-infrastructure

Author: Eric Kunze (eric-k256)

When PRs from new submitters are created, the pr-subscribers-* notification comment is not created until someone with write permissions approves the GitHub workflow to run.

I don't know if there is a way around this using workflows, but it leads to a situation where no one knows to run the workflow because the subscribers haven't been tagged/notified.

See #68509 as an example, with the PR 10 hours ago, and no comment until just now when I clicked the 'Approve and Run' button in the GitHub UI.