Replace 2-d interpolation filter pipeline with equivalent ITK filter

Summary:
@isensee implemented the 2-d interpolation in Python and noticed that our whole filter pipeline for the 2-d interpolation is already covered by ITK's ApproximateSignedDistanceMapImageFilter. I did a pixel-wise check and can confirm that the results are identical.

Fixes T28614.

Test Plan: Did a pixel-wise comparison of several interpolations.

Reviewers: O1 MITK Reviewer Group I, floca

Reviewed By: O1 MITK Reviewer Group I, floca

Subscribers: isensee

Maniphest Tasks: T28614

Differential Revision: https://phabricator.mitk.org/D520