feat(io): use correct gdcm attributes for US volume

- ImagePositionVolume, ImageOrientationVolume, FrameAcquisitionDateTime DICOM attribute are now stored into sequence element when using Enhenced US Volume, as before for CT/MR.
- DICOM Tags, SOPClasses, Modules definitions are generated from official documentation using python code. This allows friendlier operations (no need to remember exact tag values, or SOP uids).
- Unit tests have been updated to match changes and use generated DICOM tags, SOPClasses.