Attempt fix v2.0.0 newuidmap permission denied

Recently, I believe an update or packaging problem has been causing
podman to throw errors like:

```
level=error msg="running `/usr/bin/newuidmap ...`: newuidmap: open of
uid_map failed: Permission denied\n"
```

This seems to have something to do with the shadow-utils package, which
owns this binary.  I've examined the file attribuites and permissions
along with /etc/sub{uid,gid} contents.  The only thing that seems to
resolve the issue is reinstalling shadow-utils.  Attempt that fix here
and hope it clears up the problem (present in v2.0.0)

Signed-off-by: Chris Evich <chris_gitlab@icuc.me>

Containerfile

@@ -57,6 +57,7 @@ RUN for rpm in ${EXCLUDE_PACKAGES}; do x+="--exclude=$rpm "; done && \
     $DNFCMD update && \
     $DNFCMD install $x $RUNNER_RPM_URL && \
     $DNFCMD upgrade && \
+    $DNFCMD reinstall shadow-utils && \
     if [[ "${DNFCMD}" == "${_DNFCMD}" ]]; then \
       dnf clean all && \
       rm -rf /var/cache/dnf; \