mojo: Refine debug flags implementations (--list-build, --print-modules)

This also removes some needless TTY spam like the trivial dependencies
message and the notation about where your logs are stored. The latter is
simply confusing since we don't actually generate logs with these debug
flags.
2 jobs for make_it_mojo in 1 minute and 26 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #16596
smoke-test

00:01:26

passed #16595
unit-test

00:00:44