general: add snapshot_rollback_in_memory test
Add test, that in-memory connection is not persistent after rollback.
https://issues.redhat.com/browse/RHEL-31980 https://issues.redhat.com/browse/RHEL-32493
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Add test, that in-memory connection is not persistent after rollback.
https://issues.redhat.com/browse/RHEL-31980 https://issues.redhat.com/browse/RHEL-32493