NET-5879 - move the filter for non-passing to occur in the health RPC layer rather than the callers of the RPC

[jmurret]

Description

Move the logic of only passing to the HealthService.ServiceNodes RPC rather than having all callers implement it. This is part of the work exposing supplying sameness groups to the health endpoint / blocking queries that is needed for allowing consul-template to query services based on sameness groups. This PR was broken out to make the work easier to read and the sameness group stuff is in https://github.com/hashicorp/consul-enterprise/pull/9112.

This defines a HealthFilterType on ServiceSpecificRequest so that callers for Health.ServiceNodes RPC can specify which filtering they want based on health check of a service:

• no filtering
• exclude critical
• include only passing

This work is needed for the follow up sameness group because the current sameness group logic loops through the sameness group members looking for the first healthy member. In scenarios where the first N members are not healthy, the logic will would wind up creating multiple blocking queries for each member until it found a healthy one. This PR ensures that the sameness group logic can do the filtering within 1 blocking query.

Testing & Reproduction steps

Links

PR Checklist

• updated test coverage
• external facing docs updated
• appropriate backport labels added
• not a security concern