Cherry-picked old changes: Remove-MouseModeSwitcher
Summary:
Modify replacing mitkInteractionSchemeSwitcher
Remove files
Adjust test helper to directly work with an interaction observer
Test Plan: manual
Reviewers: s434n, O1 MITK Reviewer Group I, O3 MITK Reviewer Group II, kislinsk
Reviewed By: s434n, O1 MITK Reviewer Group I, O3 MITK Reviewer Group II, kislinsk
Subscribers: kalali
Maniphest Tasks: T24357
Differential Revision: https://phabricator.mitk.org/D537