setup/interactive: Silence status()'s stderr

If something happens in the background, i.e. some device goes away,
status() may fail to fetch some info (like numa_node) printing out
an ugly warning. Simply ignore it.

Change-Id: I56bc830e5832273c34999adae65e798459aba143
Signed-off-by: Michal Berger <michal.berger@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/22315


Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Jim Harris <jim.harris@samsung.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>