IT is both simplicial and quadrilateral...

So far, we were a bit sloppy about which basis we choose from the UFL
counterpart. This commit implements the necessary 1-to-1 mapping.

In many places we treat this as codegen-time information anyway.
For loopy, this is the necessary way to go.

This reverts commit 05a2c7d3

This reverts commit 6a1e7cc9

This reverts commit f83a804e

The Exadune preconditioners cant handle one sided assembly for reasons.

Run the function call over multiple data sets.

Replace placeholders in template file with actual code. This makes it a lot
easier to restructure the benchmark.