fix: removed the output of goRoutine count from the HTTP GET / of the server

[Kannaj]

When we call HTTP GET / for the rudder server - we get the below output

{"appType": "EMBEDDED", "server":"UP", "db":"UP","acceptingEvents":"TRUE","routingEvents":"TRUE","mode":"NORMAL","goroutines":"636", "backendConfigMode": "API", "lastSync":"2022-06-18T14:58:11Z", "lastRegulationSync":""}

Exposing values such as goroutines might be helpful information for harmful agents. This PR removes it from being shown by the server.

[cisse21]

@Kannaj Thanks for the PR, Can you sign this https://github.com/rudderlabs/rudder-server/blob/master/CONTRIBUTING.md so that we can go ahead and merge this change

[Kannaj]

@cisse21 done

[lvrach]

Hey @Kannaj, one more thing. Because we are following conventional commits. Can you rename your commit to much the title (it needs a fix: prefix)?

Or push another commit, empty works as well.

[Kannaj]

@lvrach - let me know if this is ok