3.236.0

Added

• Add CockroachDB database branching support.
• Add IRSA support for AWS RDS branching.
• Add support for specifying a custom image per db branch via the image field
  in feature.db_branches (all db types).
• If the operator advertises the DiagnosticsPing feature, mirrord uses the
  new ping endpoint for
  diagnosing local-to-cluster latency.

Changed

• Preview sessions that fail to start are no longer immediately deleted, to
  allow further inspection of why they failed.