Fix `interp` kwarg in `imresize` function. by Tetra-quark · Pull Request #2374 · DeepLabCut/DeepLabCut

I noticed the imresize function had usages that referred to the kwarg interp but the actual definition of the function had a different name interpolationmethod.

I then noticed that the args were provided as strings but the underlying OpenCV method actually takes an enum.

I applied the necessary corrections although I have not tested the scripts myself. I was interested in visualizing the augmentations without actively training but I wrote my own script for that.