share/containers/, .github/workflows/: Don't make(1) twice

share/containers/, .github/workflows/: Don't make(1) twice

It was being done so that the second one prints errors without races.
However, the same thing can be achieved by passing -Orecurse to make(1).

And this makes the logs even more readable, since there's no racy output
at all.

Fixes: 97f79e3b2715 ("CI: Make build logs more readable")
Link: <https://github.com/shadow-maint/shadow/pull/702>
Link: <https://github.com/nginx/unit/pull/1123>
Acked-by: Iker Pedrosa <ipedrosa@redhat.com>
Cc: Andrew Clayton <a.clayton@nginx.com>
Cc: Konstantin Pavlov <thresh@nginx.com>
Cc: Dylan Arbour <https://github.com/arbourd>
Signed-off-by: Alejandro Colomar <alx@kernel.org>