Start Docker before the Windows NanoServer integration test (#22449)
The Windows NanoServer integration job intermittently fails before `uv`
starts because the runner's Docker daemon is unavailable
([example](https://github.com/astral-sh/uv/actions/runs/37984622506/job/114004855597)).
This matches the [runner-images startup
issue](https://github.com/actions/runner-images/issues/13729#issuecomment-4183956802).
Start the `docker` service when it is not running before launching the
container.
Co-authored-by: zaniebot <242828183+zaniebot@users.noreply.github.com>