TODO this was used for internal remediation only, reconsider when / where to call from for external remediation.

MachineHealthCheckNodesCovered is a Prometheus metric, which reports the number of nodes covered by MachineHealthChecks.

MachineHealthCheckRemediationSuccessTotal is a Prometheus metric, which reports the number of successful remediations by MachineHealthChecks.

MachineHealthCheckShortCircuit is a Prometheus metric, which reports when the named MachineHealthCheck is currently short-circuited (0=no, 1=yes).