WIP: Implementation of LocalHyperDualStiffness

2 jobs for feature/localhyperdualstiffness in 5 minutes and 16 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
passed dune:git clang C++17 #97351

00:04:45

passed dune:git gcc-8 C++17 #97352

00:05:16