LHOL - Backups - unpredictable runtime

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In LHOL we have a section where customers create a backup of a table and restore from it. It takes time, one estimate says 20 minutes, to do an end to end restore. The lab guide doesn't explain this process and how long it will take, and IIRC it might also be missing instructions / providing incorrect screenshots which add confusion to the process. We should go through LHOL's backup/PITR section and re-work the guide and screenshots.