CLEANSTART-2026-IB41963 Security fixes in percona-xtradb-cluster-operator 1.18.0-r1

Package percona-xtradb-cluster-operator version 1.18.0-r1 fixes 8 vulnerabilities: CVE-2025-61726, CVE-2025-61730, CVE-2025-68121, CVE-2025-61728, CVE-2025-68119...