Expose model_transformation tag from GeoTIFF IFDs

[jakenotjay]

• Add model_transformation to the list of extra IFD keys extracted in _get_attributes, so GeoTIFFs that use a 4x4 affine transformation matrix (ModelTransformationTag) instead of the more common ModelPixelScale + ModelTiepoint pair have their georeferencing info available in the dataset attributes.
• Add a network test against an AEF embedding TIFF that uses this tag, verifying the transformation is present and the scale/tiepoint tags are absent.

[jakenotjay]

@maxrjones can I do anything about this failed "test-min-versions-build" error, or is this expected?

[maxrjones]

| @maxrjones can I do anything about this failed "test-min-versions-build" error, or is this expected?

hey @jakenotjay, thanks for the PR. I switched away from dasghub/dvc in #76 to avoid these errors. All should work if you merge main into your branch

[jakenotjay]

@maxrjones awesome, thanks for that!

[maxrjones]

Thank you!