Merge branch 'feature/refactore-vector-width-treatment' into 'master'

python/dune/perftool/generation/__init__.py

python/dune/perftool/generation/loopy.py

python/dune/perftool/loopy/buffer.py

python/dune/perftool/loopy/symbolic.py

python/dune/perftool/loopy/transformations/collect_rotate.py

python/dune/perftool/loopy/vcl.py

python/dune/perftool/options.py

python/dune/perftool/sumfact/__init__.py

python/dune/perftool/sumfact/accumulation.py

python/dune/perftool/sumfact/basis.py

python/dune/perftool/sumfact/permutation.py

python/dune/perftool/sumfact/quadrature.py

python/dune/perftool/sumfact/realization.py

python/dune/perftool/sumfact/sumfact.py

python/dune/perftool/sumfact/symbolic.py

python/dune/perftool/sumfact/tabulation.py

python/dune/perftool/sumfact/vectorization.py

python/dune/perftool/ufl/visitor.py