Description of problem:
Recording rules are used and displayed as metrics and should be documented.

We are currently missing automatic recording rules documentation in https://github.com/kubevirt/kubevirt/blob/main/docs/metrics.md and we have a story open for this CNV-23008.

Until it is fixed we need to add the snapshot recording rules manually for
kubevirt_vmsnapshot_disks_restored_from_source_total and kubevirt_vmsnapshot_disks_restored_from_source_bytes.

Version-Release number of selected component (if applicable):

How reproducible:
100%

Steps to Reproduce:
1. Go to https://github.com/kubevirt/kubevirt/blob/main/docs/metrics.md and search for the above recording rules.
2.
3.

Actual results:
No documentation

Expected results:
New recording rules should be in the metrics.md documentation file.

Additional info: