Clean up debug messages on discovery a bit

[julianoes]

From:

[02:23:08|Info ] New system on: 127.0.0.1:14580 (with system ID: 1) (udp_connection.cpp:263)
[02:23:08|Debug] New system ID: 1 Comp ID: 1 (mavsdk_impl.cpp:1079)
[02:23:08|Debug] Component Autopilot (1) added. (system_impl.cpp:493)
[02:23:09|Warn ] Vehicle type changed (new type: 2, old type: 0) (system_impl.cpp:329)
[02:23:09|Debug] Discovered 1 component(s) (system_impl.cpp:613)

To:

[02:22:26|Info ] New system on: 127.0.0.1:14580 (system ID: 1) (udp_connection.cpp:263)
[02:22:26|Debug] Component Autopilot (component ID: 1) added. (system_impl.cpp:496)
[02:22:26|Debug] Discovered 1 component (system_impl.cpp:616)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud