Mechanical: ruff format, and ruff check --fix with the rule set every NAPALM
driver uses (E, F, I, UP, B at line length 100, Python 3.10). What ruff
cannot fix comes in the next commit.
The gateway had reboot(), but the contract (HostRebootMixin) and the
application look for reboot_host(), so the gateway could not be
restarted from it. reboot_host() returns None and raises when the
gateway refuses, as the contract says.
run_device_action dispatched reboot, restart_wifi[:band] and
get_diagnostics by string, with a result shape other than its
contract's. restart_wifi(band) and get_diagnostics() are methods now;
napalm-device-types deprecates run_device_action.
BREAKING CHANGE: reboot() and run_device_action are removed.
Closes#5. Part of #6.