Groups in distrobox containers are messed up

[mcepl]

Describe the bug

Using distrobox (using distrobox-1.6.0.1-1.1.noarch and podman-4.8.3-1.1.x86_64 on MicroOS-based distro) I get this:

With a root-full container:

tumbleweed-pkg~/r/m2crypto (master)$ id
uid=1000(matej) gid=1000(matej) groups=1000(matej),0(root)
tumbleweed-pkg~/r/m2crypto (master)$ groups
matej root
tumbleweed-pkg~/r/m2crypto (master)$ sudo groups matej
[sudo] heslo pro matej: 
matej : matej wheel

With a rootless container:

fun~$ id
uid=1000(matej) gid=1000(matej) groups=1000(matej),65534(nobody)
fun~$ groups
matej nobody
fun~$ sudo groups matej
matej : matej wheel

To Reproduce
Just assemble those two containers with this distrobox.ini:

[fun]
image="registry.opensuse.org/home/mcepl/moldavite/containers/opensuse/fun:latest"
additional_packages=pandoc
init-hooks=chsh -s /usr/bin/fish
pull=true
replace=true

[tumbleweed-pkg]
image="registry.opensuse.org/home/mcepl/moldavite/containers/opensuse/distrobox-mcepl-packaging:latest"
additional_packages=python3-khard
init-hooks=chsh -s /usr/bin/fish
pull=true
replace=true
root=true

Then because of #1092 using podman switch sudo from Defaults targetpw to the default sudo behaviour (so we can function even without the root password).

Add normal user of both containers (via sudo -i) to the wheel group, restart the host system (to be certain).

Run the above shown commands.

Expected behavior
groups command would show the same result as for normal users as for the root.

Desktop (please complete the following information):

• Are you using podman, docker or lilipod? podman
• Which version or podman, docker or lilipod? see above
• Which version of distrobox? see above
• Which host distribution? MicroOS (basically openSUSE/Tumbleweed)
• How did you install distrobox? from the openSUSE packages.