Note: This is still structured for now

Rename the function and remove the backend switch. Reasoning:

- This function was only called once without the backend switching
  mechanism.
- The function takes different arguments than the pdelab
  pymbolic_quadrature_position.
- It returns only one component of the quadrature point.

Probably not the solution we want to have in the long run but right
now it is not possible to have a backend switch for
default/blockstructured/sumfact. This way the old code should behave
the same way as before and it is possible to switch between those
three things.

Adjust time stepping parameters of navierstokes 3d test

See merge request dominic/dune-perftool!253

Merge branch 'test/adjust-time-step-in-test' of ssh://gitlab.dune-project.org:22022/dominic/dune-perftool into test/adjust-time-step-in-test

Revert "Switch to repositories on submodules which comply with our filters in CI network configuration"

This reverts commit 92bd8051fd7fe925914f2c57c3ee6972c1a9fe73.

This reverts commit 32e8611140c7af63f26497b88c9b1626262e4d4c.

Revert "Switch to repositories on submodules which comply with our filters in CI network configuration"

This reverts commit 92bd8051fd7fe925914f2c57c3ee6972c1a9fe73.

This reverts commit 32e8611140c7af63f26497b88c9b1626262e4d4c.

Enable testing on Heidelberg runner

See merge request dominic/dune-perftool!252

This will leave the coverage of the testing suite untouched!

Add an option to allow turning off vectorization of jacobians

See merge request dominic/dune-perftool!249

They are only to a lesser extent important for our HPC applications
and the vectorization algorithm struggles with the complexity of the
search space.

Fix nondeterministic quadrature position bug

Closes #110

See merge request dominic/dune-perftool!248

Fix performance bugs with the sumfact kernels in functions merge

See merge request dominic/dune-perftool!246

Improve logging of vectorization strategy

See merge request dominic/dune-perftool!245