To reproduce, build any tier for rawhide from the base-images repo (https://gitlab.com/fedora/bootc/base-images). E.g.:

```
$ podman build --security-opt=label=disable --cap-add=all   --device /dev/fuse -t quay.io/jlebon/fedora-bootc:tier-x . --build-arg MANIFEST=fedora-tier-x.yaml --from quay.io/fedora/fedora:rawhide
...
passt-selinux.post: Could not set context for /etc/selinux/targeted/tmp/modules/100/rtas/lang_ext:  Operation not supported
passt-selinux.post: Could not set context for /etc/selinux/targeted/tmp/modules/100/rtas:  Operation not supported
passt-selinux.post: Could not set context for /etc/selinux/targeted/tmp/modules/100/rtkit/cil:  Operation not supported
passt-selinux.post: Could not set context for /etc/selinux/targeted/tmp/modules/100/rtkit/hll:  Operation not supported
...
Could not set context for /etc/selinux/targeted/tmp/commit_num:  Operation not supported
Could not set context for /etc/selinux/targeted/tmp/file_contexts:  Operation not supported
Could not set context for /etc/selinux/targeted/tmp/file_contexts.homedirs:  Operation not supported
```

https://src.fedoraproject.org/rpms/selinux-policy/pull-request/480 fixed it for selinux-policy-targeted itself, but basically any package that installs SELinux modules would need to do the same change. As well, recompiling the policy (like rpm-ostree does during the compose) triggers the warnings. Which I think overall argues for fixing the tooling itself to not warn.

See also https://gitlab.com/fedora/bootc/tracker/-/issues/45

Reproducible: Always