Cekit builder built with CEkit

[etsauer]

@cgruver this is my attempt to "CEkit-ify" your cekit-builder image from https://github.com/cgruver/dev-workspace-utilities/tree/main/cekit-builder

I'm currently having issues when trying to run a build using it. Here's what I'm getting:

$ cekit build podman
...
2024-05-02 17:19:39,489 podman.py:59         INFO  Building container image...
STEP 1/41: FROM registry.access.redhat.com/ubi9/ubi:9.4
STEP 2/41: USER root
STEP 3/41: COPY             entrypoint.sh             /tmp/artifacts/
STEP 4/41: COPY modules/developer-base /tmp/scripts/developer-base
STEP 5/41: USER root
STEP 6/41: RUN dnf --setopt=tsflags=nodocs install -y compat-openssl11 diffutils git iproute jq less libbrotli lsof man-db nano procps-ng perl-Digest-SHA net-tools openssh-clients rsync socat sudo time vim-enhanced wget zip buildah skopeo podman-docker             && rpm -q compat-openssl11 diffutils git iproute jq less libbrotli lsof man-db nano procps-ng perl-Digest-SHA net-tools openssh-clients rsync socat sudo time vim-enhanced wget zip buildah skopeo podman-docker
WARN[0000] pkg/bind: error detaching "/var/tmp/buildah2311396013/mnt/buildah-bind-target-1": permission denied 
WARN[0000] pkg/bind: error removing "/var/tmp/buildah2311396013/mnt/buildah-bind-target-1": device or resource busy 
WARN[0000] pkg/bind: error removing "/var/tmp/buildah2311396013/mnt": directory not empty 
ERRO[0000] permission denied                            
error running container: from /usr/bin/crun creating container for [/bin/sh -c dnf --setopt=tsflags=nodocs install -y compat-openssl11 diffutils git iproute jq less libbrotli lsof man-db nano procps-ng perl-Digest-SHA net-tools openssh-clients rsync socat sudo time vim-enhanced wget zip buildah skopeo podman-docker             && rpm -q compat-openssl11 diffutils git iproute jq less libbrotli lsof man-db nano procps-ng perl-Digest-SHA net-tools openssh-clients rsync socat sudo time vim-enhanced wget zip buildah skopeo podman-docker]: set propagation for `proc`: Permission denied
: exit status 1
ERRO[0001] did not get container create message from subprocess: EOF 

Trying to figure out what the important difference is here.