rcS: shift sensors + EKF startup earlier

[dagar]

We want the drivers, sensors hub, and estimator running as soon as possible to initialize and avoid false positives from commander complaining about missing data.

[github-actions]

FLASH Analysis

px4_fmu-v5x

    FILE SIZE        VM SIZE    
--------------  -------------- 
+0.0%     +96  +0.0%     +96    .text
  +0.1%     +89  +0.1%     +89    ROMFS/nsh_romfsimg.c
  +0.0%      +7  +0.0%      +7    [section .text]
-0.4%     -96  [ = ]       0    [Unmapped]
[ = ]       0  +0.0%     +96    TOTAL

px4_fmu-v6x

    FILE SIZE        VM SIZE    
--------------  -------------- 
+0.0%     +96  +0.0%     +96    .text
  +0.1%     +89  +0.1%     +89    ROMFS/nsh_romfsimg.c
  +0.0%      +7  +0.0%      +7    [section .text]
-0.1%     -96  [ = ]       0    [Unmapped]
[ = ]       0  +0.0%     +96    TOTAL

Updated: 2024-11-27T22:42:55

[MaEtUgR]

Seems like a good idea to me. We should do some additional testing but I currently don't see what should go wrong.