Fixes to the anisotropic segmentation of FastSurfer

[dkuegler]

Several fixes to voxelsize-associated settings in FastSurfer

• conform did not support int datatype voxel sizes, which only happen when manually passed.
• Fix CerebNet bounding boxes that are too small (smaller than the patch size).
• Fix when CerebNet was complaining about voxel sizes (inverted check)
• Fix brun_fastsurfer.sh issue: brun did not properly assign the device in some cases (when multiple devices were passed).
• Fix viewagg_device issue, where auto always defaulted to device number 0 instead of to the device set with --device (for VINN, CerebNet, HypVINN).
• Extract function orientation_to_ornts from to_target_orientation for consistency, also introduce StrictOrientationType
• Add better output to is_conform that also shows the current situation (image size and voxel size and affine) to the output
• Fix the passing of the voxel size (zoom) to FastSurferVINN and HypVINN
• Some formatting fixes