Use of SQ internal API instead of localhost

[Sancretor]

Is your feature request related to a problem? Please describe.

As of now, the tool builds SQ API urls based on localhost but on some environments this may not work because of a particular firewall configuration or else.
If possible, we should not rely on an hardcoded address and determine dynamically the server base URL.

Describe the solution you'd like

We could use internal SonarQube API via specific components, and see if it uses "localhost" or something else.
It may be better to rely on SQ's own capability to determine how to access its own APIs.

Describe alternatives you've considered

We could also rely on SonarQube base URL directly.