CI: Use firewall script from previous release

The previous release has not been Rocky for a while.

Change-Id: Ic082ed08614c0f90d82ff211ac3dd19ed78d2bf5

playbooks/kayobe-overcloud-upgrade-base/run.yml

@@ -16,8 +16,7 @@
           # be run after install.
           shell:
             cmd: dev/configure-firewall.sh
-            # Does not exist in Rocky release, use script from later version.
-            chdir: "{{ kayobe_src_dir }}"
+            chdir: "{{ previous_kayobe_src_dir }}"
 
         - name: Ensure overcloud is deployed
           shell: