Add OIDC Health Check

[sberyozkin]

Description

OIDC Health Check that provides status for every configured OIDC tenant should be added

Implementation ideas

Start with pinging an OIDC well-known configuration endpoint when it is available.

Proposed OIDC tenant statuses are OK, Not Ready, Disabled, Error and Unknown.

The check status should be UP if at least one of tenants is OK, and DOWN otherwise.

Pluggable OidcHealthCheckProvider may be in supported in the future to provide more detailed OIDC health status report.
Also, this health check may get eventually moved to OIDC common for other OIDC aware extensions offer it as well.

[quarkus-bot]

/cc @jmartisk (health), @pedroigor (oidc), @xstefank (health)