Rename getInteractionMatrix() to computeInteractionMatrix()

[catree]

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• [X] I agree to contribute to the project under Apache 2 License.
• [X] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
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• [X] There is a reference to the original bug report and related work
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see https://github.com/opencv/opencv_contrib/pull/3641

cc @simutisernestas @savuor

I prefer to use computeInteractionMatrix() instead of getInteractionMatrix() naming. I have added references to some classical papers on this subject. Even if it is out of scope, they can be useful.

Warning, one bibtex reference already exist in the main opencv repo. I don't know if we can use @cite defined in the main repo?