* and stop setting default values in python operator code, so defaults can be set at the server side.

This issue is just for the PR and questions from maintainers. 
setup.py
"""Forces installation of providers from sources in editable mode."""
    def run(self) -> None:
        self.announce('Standard installation. Providers are installed from packages', level=log.INFO)
        super().run()
def do_setup() -> None:
    """
    Perform the Airflow package setup.
    Most values come from setup.cfg, only the dynamically calculated ones are passed to setup
    function call. See https://setuptools.readthedocs.io/en/latest/userguide/declarative_config.html
    """
    setup_kwargs = {}
    def include_provider_namespace_packages_when_installing_from_sources() -> None:
        """