Test backup/restore for percona-server using mysql addon

[hmsayem]

https://discord.com/channels/439940043369349120/895182505076998155/1200001755396706304
https://docs.percona.com/percona-server/8.0/index.html
https://docs.percona.com/percona-operator-for-mysql/ps/index.html

[hmsayem]

• Backup
• Restore

Error: Access denied; you need (at least one of) the SYSTEM_USER privilege(s) for this operation