Refactor worker healthchecks

[daveqnet]

Is your feature request related to a specific problem?

• To fix When Workers are Enabled Webserver Health Check Takes a Long Time to Respond #2517, the worker part of /health API request processing was eliminated - see Disable worker part of /health check #3898 for details on the code change.
• The fix above is quick and dirty, but leaves fides without a reliable method of checking worker health.
• This feature request is to re-introduce worker health checking in some form without a regression of the API latency impacts of When Workers are Enabled Webserver Health Check Takes a Long Time to Respond #2517

Describe the solution you'd like

As discussed with @ThomasLaPiana:

• Move the worker health check to a separate endpoint. This keeps health lean and quick, while still giving us the ability to check in on the workers if we need to
• Dig in and find a better, more performant replacement for the old worker check

Describe alternatives you've considered, if any

Do nothing, but this leaves fides open to reliability issues.

[ThomasLaPiana]

@daveqnet FYI I've got a PR up that should fix this. It is still relatively high latency but it now has its own endpoint so we can set that accordingly