Revert "coreutils-native: don't install groups"

Revert "coreutils-native: don't install groups"

This reverts commit 113225b93c55d55a330fcca7d9f996ec039fb953.

The groups command was previously installed by shadow. Therefore the
one provided by coreutils was removed for native to avoid a conflict.
However, since version 4.17.0, shadow no longer installs a groups
command and thus there is no conflict anymore.

Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>