sensors: always start baro/GPS/mag aggregators if SYS_HAS_* set

[dagar]

• add new SYS_HAS_GPS parameter
• the sensors hub aggregators for baro, GPS, mag now start based only on the SYS_HAS_* parameters rather than waiting for valid sensor data to mark all parameters active as soon as possible (param sync)
• fixes Several SENS_* params could be not marked as used on start #18110

@lukegluke can you give this a try?

[lukegluke]

Thanks, it fix the issue, no param sync issue depending on gps state now.
But just to notice, I've tested not with recent master (somewhere before v1.12.0-beta1) and haven't tested preflight logic, but looks ok.

[dagar]

But just to notice, I've tested not with recent master (somewhere before v1.12.0-beta1) and haven't tested preflight logic, but looks ok.

Thanks, that's worth pointing out. I didn't like the GPS was being marked present and healthy initially regardless of actual status.