Webservice: implement configurable health_check_listener for Workhorse

What does this MR do?

Webservice: implement configurable health_check_listener for Workhorse

Implement configuration and use of health_check_listener for Workhorse

• Boolean switch to using listener, results in change to readinessProbe of workhorse as http, disable of webservice
• Enable configuration of Puma Control service (added variable)
• Expose simplistic settings verbatim defaults

Related to gitlab-org/build/CNG!2654 (merged)

Related to gitlab-org/gitlab!207192 (merged)

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