batcave: override basearch in rhel10.0 sync

In order to correctly sync each architecture's repos, we have to
override the basearch while running reposync.  Otherwise we are just
syncing the the host architecture (x86_64) multiple times under
misleading directory names.

Signed-off-by: Carl George <carlwgeorge@gmail.com>

roles/batcave/files/rhel10-sync

@@ -11,6 +11,7 @@ for releasever in ${RELEASEVERS[@]}; do
             dnf \
                 --config /srv/web/repo/rhel/rhel10/dnf.conf \
                 --releasever $releasever \
+                --forcearch $arch \
                 --repo $repo \
                 reposync \
                 --download-metadata \