Tests for single bit compression

[CPBridge]

Describe the changes

Add/fix test files for the single bit compression pull request on pydicom main repo

The existing liver_nonbyte_aligned.dcm, that I previously added, is updated to fix the fact that when I created it by tweaking the liver.dcm file, I generated a new SOPInstanceUID but left the file metadata MediaStorageSOPInstanceUID at the old value. In this PR I bring the MediaStorageSOPInstanceUID in line with the SOPInstanceUID.

The following compressed single bit image test files are added. All are compressed versions of either liver.dcm or liver_nonbyte_aligned.dcm created using pydicom and the aforementioned branch:

• liver_deflate.dcm
• liver_nonbyte_aligned_deflate.dcm
• liver_rle.dcm
• liver_nonbyte_aligned_rle.dcm
• liver_j2k.dcm
• liver_nonbyte_aligned_j2k.dcm

(deflate = frame level deflate, j2k = JPEG2000Lossless, nonbyte_aligned = frames that are not a multiple of 8 pixels, which are an important special case for tests with single bit images due to bitpacking)

Tasks

• In a branch on your fork of pydicom-data, add or modify data files
• Create a pull request for pydicom-data
• Update the commit hash for the urls in a fork/branch of the pydicom file [urls.json]https://github.com/pydicom/pydicom/blob/master/pydicom/data/urls.json and create a pydicom pull request
• pydicom unit tests passing
• [] Documentation updated (if needed)