scripts/setup: Use `sudo` only if available
scripts/setup: Use `sudo` only if available

It isn't available in Debian and Ubuntu docker containers by default.

Signed-off-by: Adam Jeliński <ca915f0ff48aa92c63766034d91f63de55abeb4f@antmicro.com>

google/CFU-Playground,google/CFU-Playground,google/CFU-Playground,google/CFU-Playground