Sync vars from redhat.yml to redhat-9.yml

In terms of EL9, it first loads redhat-9.yaml var and ignores
the redhat.yaml var.
It ignores the installation of podman packages and which further
leads to missing directories.

By syncing the required vars from redhat.yml to redhat-9.yml
fixes the issue.

Closes-Bug: #1955962

Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
Change-Id: I6c520f31c8f7d720f090596faac0277faa00f90d

tripleo_ansible/roles/tripleo_podman/vars/redhat-9.yml

@@ -14,5 +14,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+_tripleo_podman_packages:
+  - podman
+
+_tripleo_buildah_packages:
+  - buildah
 
 tripleo_container_default_runtime: crun