v0.21.0

[etcd-backup-restore]

🐛 Bug Fixes

• [OPERATOR] To avoid race-condition between closing of snapshotter and taking snapshot after defrag, removing the out-of-schedule full snapshot triggered after defragmentation of etcd. (gardener/etcd-backup-restore#554, @ishan16696)
• [OPERATOR] To avoid potential race-condition between go-routines updated probeEtcd func() to use shorter timeout. (gardener/etcd-backup-restore#532, @ishan16696)

🏃 Others

• [OPERATOR] Removes the redundant closing of snapshotter during initialization. (gardener/etcd-backup-restore#546, @ishan16696)
• [OPERATOR] Always update member peer URL, changed the way scale-up of etcd cluster is identified. (gardener/etcd-backup-restore#534, @unmarshall)
• [OPERATOR] Decreases the likelihood of potential race condition between the go-routines while closing the snapshotter. (gardener/etcd-backup-restore#537, @ishan16696)
• [OPERATOR] [bug-fix] backup-restore does not return error when it fails to update PeerURL of member. (gardener/etcd-backup-restore#540, @aaronfern)

📰 Noteworthy

• [OPERATOR] Updated golang version used to build images to 1.19.2 (gardener/etcd-backup-restore#551, @aaronfern)
• [OPERATOR] Updated golang version used to build images to 1.18.6 (gardener/etcd-backup-restore#535, @aaronfern)
• [OPERATOR] Updated golang version to 1.18 (gardener/etcd-backup-restore#535, @aaronfern)