[python][ci] Fix Python environment setup with dune 2.9

5 jobs for !2934 with feature/python-with-dune-2.9
latest detached
Status Name Job ID Coverage
  Trigger
passed full-dune-latest-release-clang

passed full-dune-latest-release-gcc

passed full-dune-master-gcc

passed minimal-dune-latest-release-gcc

 
  Downstream Modules
passed trigger lecture