Consul version metric improvements

[berkeli]

Feature Description

Consul version metric currently exports version name and ONLY on servers.

It would be good if it exported version_sha, and also on clients.

Use Case(s)

for exporting metrics on clients - we would like to monitor the state of 80k+ consul deployment, which versions they are running and anomalies related to version change.

for exporting sha - we use a fork of consul to apply security patches, same as above - we would like to monitor versions including sha changes.

Happy to work on this feature if it sounds reasonable