Feature: element_face_get_ancestor_face function

[holke]

Closes #1738 currently stil WIP but i already started working on it.

Describe your changes here:
Started a new element_face_get_ancestor_face scheme function.

Given an element and a face of an element as well as an ancestor of the element
that has a face that is an ancestor of the given face, compute the corresponding face number of the ancestor element.

Added first implementations.
For vertex, quad, tri, hex, prism the face numbers do not change across the refinement history.

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[holke]

See #1958
We can abandon this. I might merge this into #1958