Currently WSL uses UTF-16 encoded output by default but is planning
to use UTF-8.
See https://github.com/containers/podman/issues/26527
To get ready for the change we are enforcing UTF-8 encoded output by
setting the environment variable `WSL_UTF8=1` and by updating the
code that transfomed wsl output from UTF-16 to UTF-8.
Fixes https://github.com/containers/podman/issues/26527
Signed-off-by: Mario Loriedo <mario.loriedo@gmail.com>