This PR introduces a new event which is similar as Github's. When a new
commit status submitted, the event will be trigged. That means, now we
can receive all feedback from CI/CD system in webhooks or other notify
systems.
ref:
https://docs.github.com/en/webhooks/webhook-events-and-payloads#statusFix#20749
Fix#26723
Add `ChangeDefaultBranch` to the `notifier` interface and implement it
in `indexerNotifier`. So when changing the default branch,
`indexerNotifier` sends a message to the `indexer queue` to update the
index.
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Co-authored-by: techknowlogick <matti@mdranta.net>
