[nps] don't bypass ahrs by default

By default use the result of the normal ahrs estimation,
if you want to bypass that and use the attitude from NPS define NPS_BYPASS_AHRS to TRUE.
[rotorcraft][messages] GUIDANCE_H_INT message
Merge branch 'master' into ahrs_int_cmpl_quat_correction_scaling

relevant fixes/features from master:
- don't bypass normal ahrs estimation in NPS by default
- use horizontal guidance ref by default (and for HOVER mode)
- abs(c_route) and abs(s_route) instead of abs(route) in north and east route components calculation