DicomStack.to_nifti(embed_meta=True) fails for 5D and 4D dicoms

[AlanKuurstra]

When embedding metadata, DicomStack does not account for 5D or 4D data stored in a single dicom.

dcmstack/src/dcmstack/dcmstack.py

Lines 961 to 975 in 27856f1

	if len(data.shape) == 5:
	if data.shape[3] != 1:
	vec_meta = []
	for vec_idx in range(data.shape[4]):
	start_idx = vec_idx * data.shape[3]
	end_idx = start_idx + data.shape[3]
	meta = DcmMetaExtension.from_sequence(
	vol_meta[start_idx:end_idx], 3)
	vec_meta.append(meta)
	else:
	vec_meta = vol_meta
	meta_ext = DcmMetaExtension.from_sequence(vec_meta, 4)
	elif len(data.shape) == 4:
	meta_ext = DcmMetaExtension.from_sequence(vol_meta, 3)

The if statements on len(data.shape) should also include a condition on len(vol_meta) > 1