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/common/locking.py

@@ -5,6 +5,7 @@ try:
         def __init__(self, path, flags, *args, **kwargs):
             _Lock.__init__(self,path,*args,flags=flags,timeout=None,**kwargs)
 except ModuleNotFoundError:
+    import os
     import fcntl
     from fcntl import LOCK_EX, LOCK_SH
     # file locking from fcntl