Instance CPU metrics

[david-crespo]

OxQL is here and it's real.

get virtual_machine:vcpu_usage | filter timestamp > @now() - 5m && instance_id == "f63a9569-2fcf-4625-97ab-7599cc557c9e" | align mean_within(30s) | group_by [state], sum

[david-crespo]

Blocked by authz work on the API side. It could be light depending on how one-off we want to make it. See options here: oxidecomputer/omicron#5298 (comment)

[david-crespo]

Not happening in v9. Putting in 10 for now but we'll need to revisit based on underlying capabilities.