Remove large files from the history by managing SampleData as release assets

[jcfr]

To improve the overall speed for checking out the code, I suggest to remove the SampleData branch and instead create a release and upload the SampleData as assets.

This script describe the steps to create such release. See https://gist.github.com/jcfr/9c0c0133c2d3fa2b029e6dd2648f7720

We use a similar approach in these projects:

• https://github.com/BrownBiomechanics/SlicerAutoscoperM/releases/tag/docs-resources
• https://github.com/BrownBiomechanics/Autoscoper/releases/tag/sample-data

[jcfr]

Additional guidance is available in the following issue:

• https://github.com/WashUMusculoskeletalCore/Slicer-MusculoskeletalAnalysis/issues/9