Ground truth radar poses are not loaded by the dataset class correctly

[cheneyuwu]

https://github.com/utiasASRL/pyboreas/blob/7a133355302a35a3e2c328a9d3d7ae27df188d7f/pyboreas/utils/odometry.py#L737 Either pitch or roll should be pi instead of 0 - maybe just round line[8] and line[7] to the nearest k * pi?