Fix function signature for local_refresh

[dimaqq]

Description

The code assumes quite a lot about the arguments.
It seems that there are no users of the function today, because the arguments are kinda broken.

Folks work around by calling juju cli instead, e.g.:

# oidc-gatekeeper-operator/tests/integration/test_charm.py
149-        print("Try to refresh stable charm to locally built")
150-        # temporary measure while we don't have a solution for this:
151-        # * https://github.com/juju/python-libjuju/issues/881
152:        # Currently `application.local_refresh` doesn't work as expected.

Urgency

Casually reporting

Python-libjuju version

any

Juju version

any

Reproduce / Test

pyright

[dimaqq]

See 0771a65 for an attempt to do this.

[benhoyt]

@dimaqq Can you please be a bit more specific? What does it assume about the arguments, and what are the specific issues?

[dimaqq]

Function has None defaults for parameters that are actually required.

Users work around this function by shelling out because they can’t get a working set of arguments together.