Backport #28325 by @brechtvl
Changing an issue status, assignee, labels or milestone without also
adding a comment would not update the index, resulting in wrong search
results.
Co-authored-by: Brecht Van Lommel <brecht@blender.org>
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>
