Jungfrau: Investigate acceleration offset deg

The old jungfrau Bluesky plans hardcoded the acceleration offset parameter to 10. This parameter is effectively saying "how much distance does this motor need to cover before it has reached the desired speed", so overshooting is fine - it just wastes a bit of time.

We should investigate whether the calculation in `calculate_motion_profile` gives a suitable `acceleration_offset_deg`. Until then, it is hardcoded to 10.

## Acceptance Criteria
- Test on i24 using the calcualtion in `calculate_motion_profile`. If sufficient, remove the hardcoded 10