Create test for text-mode setup bootstrapper

[rozniak]

Need to test the waters on how text-mode setup, and the setup bootstrapping will work.

Basically setup has to be bootstrapped from a system where there can only be minimal assumptions. Will get something working presumably using /bin/dash (cannot rely on Bash in the final setup bootstrapper) to probe things and get stuff moving.

Will need to be script based, cannot use pre-compiled binaries for setup due to systems that may use different libc implementations I believe (musl in the case of Alpine Linux).