We should not use .items[0].metadata.name if the array length is 0. This
is the case when nothing has been initialized yet. Instead, we should
use .items[*].metadata.name, the wildcard ensures to always return 0
even if nothing is present yet.
Fixes: https://github.com/rook/rook/issues/8676
Signed-off-by: Sébastien Han <seb@redhat.com>