Nested operations do not support programmatic sudo

Describe the bug

Trying to use nested operations which require programmatic sudo access throws AttributeError

UPDATE: perhaps this should just be that nested operations do not support custom config attributes(?)

To Reproduce

from pyinfra import config

config.USE_REMOTE_SUDO_PASSWORD = "something"

def callback():
    result = server.shell(
        commands=["cat foo"],
        _sudo=True,
        _use_sudo_password=config.USE_REMOTE_SUDO_PASSWORD
    )

def caller(vm_name):
    python.call(
        name="Execute callback function",
        function=callback,
    )

[server.foo] Unexpected error in Python callback: AttributeError("'Config' object has no attribute 'USE_REMOTE_SUDO_PASSWORD'",)

Expected behavior

I would expect a nested operation to support programmtic sudo access

Meta

• Include output of pyinfra --support.

    System: Linux
      Platform: Linux-5.10.105-1-MANJARO-x86_64-with-glibc2.35
      Release: 5.10.105-1-MANJARO
      Machine: x86_64
    pyinfra: v2.1
    Executable: /home/user/workspace/something/venv/bin/pyinfra
    Python: 3.10.4 (CPython, GCC 11.2.0)

Start by reproducing the nested python.call callback from the issue, focusing on server.shell with _sudo and _use_sudo_password=config.USE_REMOTE_SUDO_PASSWORD. Trace how configuration is exposed inside nested operations; done means the example no longer raises AttributeError and programmatic sudo works, or the supported limitation is documented.