Merge of small MRs that make changes to the Python bindings

Merges

• !931 (closed) feature/store-commit-hash-in-pypi-package
• !929 (closed) bugfix/packagemetadata
• !909 (closed) feature/generator-speed-up
• !908 (closed) feature/verbose-jit
• !923 (closed) bugfix/missing-dependecies-for-pip-install-dune-common
• !920 (closed) issue/find_installed_modules
• !928 (closed) bugfix/dunepy_fix_path_to_installed_module
• !921 (closed) bugfix/use-additional-pip-params-in-wheel-building
• !931 (closed) feature/store-commit-hash-in-pypi-package

The whole MR needs some squashing before commit

python/dune/packagemetadata.py

@@ -265,15 +265,12 @@ def cmakeFlags():
     ]))
     # test environment for additional flags
     cmakeFlags = os.environ.get('DUNE_CMAKE_FLAGS')
-    print("@@@@@ cmakeFlags=",cmakeFlags,flush=True)
     # split cmakeFlags and add them to flags
     if cmakeFlags is not None:
         flags += shlex.split(cmakeFlags)
     cmakeFlags = os.environ.get('CMAKE_FLAGS')
-    print("@@@@@ cmakeFlags=",cmakeFlags,flush=True)
     if cmakeFlags is not None:
         flags += shlex.split(cmakeFlags)
-    print("@@@@@ flags=",flags,flush=True)
     return flags
 
 def inVEnv():