invalid host event

[dgulinobw]

Error log associated with a host record that is active=retired and the agent no longer exists.
when=2024-08-23T18:54:38.913928+00:00 level=error pid=<0.1489.0> at=dog_host:new_state/4:966 unstructured_log="Invalid event: keepalive_timeout, for state : <<\"retired\">> for host: #{<<\"name\">> =>...

[dgulinobw]

This was caused by changes to disable alerting, which also broke the host state changes. Moved alert disabling code out of event path.