Skip running the tests for the old arrange algorithm

So that the output of the CI/CD testing step is not cluttered with deprecation warnings.

Done during TTT

tests/TestArrange.py

@@ -2,10 +2,13 @@
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import numpy
+import pytest
 
 from cura.Arranging.Arrange import Arrange
 from cura.Arranging.ShapeArray import ShapeArray
 
+pytestmark = pytest.mark.skip()
+
 def gimmeTriangle():
     """Triangle of area 12"""