When setting up transient mounts, which are used for exposing CA certificates and RPM package repositories to a build, a recent change we made in the builder attempted to replace simple bind mounts with overlay mounts.  While this might have made things easier for unprivileged builds, we overlooked that overlay mounts can't be made to files, only directories, so we need to revert the change.

4.14.0

Always

Per https://redhat-internal.slack.com/archives/C014MHHKUSF/p1696882408656359?thread_ts=1696882334.352129&cid=C014MHHKUSF,
1. oc new-app - l app=pvg-nodejs --name pvg-nodejs pvg-nodejs https://github.com/openshift/nodejs-ex.git

mount /var/lib/containers/storage/overlay-containers/9c3877f3062cc18b01f30db310e0e2bd0a1cd4527d74f41c313399e48fa81d23/userdata/overlay/145259665/merge:/run/secrets/redhat.repo (via /proc/self/fd/6), data: lowerdir=/tmp/redhat.repo-copy2014834134/redhat.repo,upperdir=/var/lib/containers/storage/overlay-containers/9c3877f3062cc18b01f30db310e0e2bd0a1cd4527d74f41c313399e48fa81d23/userdata/overlay/145259665/upper,workdir=/var/lib/containers/storage/overlay-containers/9c3877f3062cc18b01f30db310e0e2bd0a1cd4527d74f41c313399e48fa81d23/userdata/overlay/145259665/work: *invalid argument*"

Successful setup for a transient mount to the redhat.repo file for a RUN instruction.

Bug introduced in https://github.com/openshift/builder/pull/349, should be fixed in https://github.com/openshift/builder/pull/359.