Revision ignored if create_repo_from_pip_url is used

[jensens]

Expected: If one passes an pipurl with a ...@some-branch the branch should be picked.

Current behavior: It ignores the given branch and uses the default branch (like master or main).

Analysis:

• rev is parsed correctly
• rev is passed to the specialized classes constructor as kwarg, i.e. for Git.
• from there rev is passed to the base class constructor as kwarg.
• In the base class constructor all kwargs are ignored.

Solution:
If a kwargs rev is passed to the base constructor, stored it as an instance variable.