Add missing overlay for `cosmic-rocky-ha` bundle

The `cosmic-rocky-ha` test was failing due to a missing overlay.
However keep the test disabled as it consistently times out atm.

Change-Id: I8448d7111cb933e3b56a2a4879e81d86b9af517e

src/tests/bundles/overlays/cosmic-rocky-ha.yaml.j2

@@ -0,0 +1,4 @@
+applications:
+  octavia:
+    options:
+        vip: '{{ OS_VIP00 }}'

src/tests/tests.yaml

@@ -3,15 +3,16 @@ gate_bundles:
 - bionic-rocky
 - bionic-rocky-ha
 - cosmic-rocky
-- cosmic-rocky-ha
 smoke_bundles:
 - bionic-rocky
 comment: |
   The `bionic-rocky-lxd` bundle currently fails due to a bug in LXD.
-  https://github.com/lxc/lxd/issues/4947
+    https://github.com/lxc/lxd/issues/4947
   Holding the `cosmic-rocky-lxd` bundle awaiting required changes to CI.
+  Holding the `cosmic-rocky-ha` bundle due to it consitently timing out atm.
 dev_bundles:
 - bionic-rocky-lxd
+- cosmic-rocky-ha
 - cosmic-rocky-lxd
 target_deploy_status:
   octavia: