multilabel interpolation functionality added

Summary:
Ref T27319.

Added Multilable interpolation features.
Corrected for crashes occurring due to interruptions.
Functionality for layers added.
Corrected the uninitialized variable in ContourPosition
added mitkLabelSetImage.cpp
Made some of the changed recommended by Ralf

Test Plan: Manual Testing, in accordance with the updated checklist.

Reviewers: O1 MITK Reviewer Group I, kislinsk, floca

Reviewed By: O1 MITK Reviewer Group I, kislinsk

Subscribers: kalali, s434n, floca, kislinsk

Maniphest Tasks: T27319

Differential Revision: https://phabricator.mitk.org/D672