feat: improvements of create_zfs_snapshot script

Description

• Detect pg version to adjust replication mode.
• Stop psql with non 0 code on error added.

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Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes and they have been reviewed OR there are no API changes