Improved GitHub Action to run clang-format as part of clang-tidy
* Simplify clang-tidy workflow
* Added modernize-use-using, modernize-redundant-void-arg, readability-static-accessed-through-instance
* Add nolint for libecl typedefs
Make sure that the first cell in RigConnection is assigned the lowest cell index. Assign the opposite face if the cell indexes are swapped.
In RigCellFaceGeometryTools, test both combinations of (cellA, cellB) and (cellB, cellA)