Fix SMF service parsing for intermediate states

[karencfv]

When checking the system/update-status endpoint after an update the contact_support field briefly flipped to true with the following log message where a service was transitioning from an online state to something else:

(sled): SvcsEnabledNotOnline(SvcsEnabledNotOnline { services: [], errors: ["Found a service with an unknown state: online*        svc:/oxide/crucible/downstairs:downstairs-2c0a8c3f-abdd-46b3-bfda-da002d7c47e6 oxz_crucible_0437b69d-73a8-4231-86f9-6b5556e7e7ef"], time_of_status: 2026-08-04T21:25:48.026111Z })}

This is due to us not parsing intermediate states at all in the illumos-utils svcs submodule. These intermediate states should be handled.

[karencfv]

There are two ways to represent this:

We could have a new InTransition state in the SvcState enum, with the caveat that this would be a state that does NOT officially exist in the svcs library.

Another option is to be really specific like the response from svcs, which appends an asterisk to the previous state it was in. Having states like OnlineInTransition, OfflineInTransition etc. This feels overkill though.