Needs approval from an approver in each of these files:
- ~~[OWNERS](https://github.com/scylladb/scylla-operator/blob/master/OWNERS)~~ [tnozicka,zimnx]
Approvers can indicate their approval by writing `/approve` in a comment
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5.3 specified wasn't released ever. This bumps minimum ScyllaDB to oldest non-EOL ScyllaDB, and latest Scylla Manager.