Merge branch 'issue/cleanup_errors' into 'master'

Cleanup errors after LocalOperator merge

See merge request !266
7 jobs for master in 62 minutes and 5 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #25206
dune-2.6

00:28:36

passed #25207
dune-2.7

00:35:39

passed #25208
dune-git-clang

00:27:37

passed #25211
dune-git-eigen-gcc

00:42:03

passed #25209
dune-git-istl-gcc

00:45:06

passed #25212
dune-git-mtl-gcc

00:31:53

passed #25210
dune-git-petsc-gcc

00:35:09