Switch vault-k8s channel to 1.15/edge in tests

In caas tests smoke bundle, change vault-k8s
channel to 1.15/edge.
Pin revision to 190 so that vault gets auto
unsealed.
Rebuild barbican-k8s to test vault change

Change-Id: Id70b545f0021ba720af33eb8a350a0a1e29d79af

charms/barbican-k8s/rebuild

@@ -1,3 +1,3 @@
 # This file is used to trigger a build.
 # Change uuid to trigger a new build.
-c3b9c7c9-2bd4-4df1-a1df-89c729b34eb6
+f2b6ccb2-fa3c-11ee-8a21-9b8b4c7667f2

tests/caas/smoke.yaml.j2

@@ -18,7 +18,8 @@ applications:
     constraints: cpu-power=1000 mem=1G
   vault:
     charm: ch:vault-k8s
-    channel: latest/edge
+    channel: 1.15/edge
+    revision: 190
     base: ubuntu@22.04
     scale: 1
     trust: false

tests/caas/tests.yaml

@@ -26,7 +26,7 @@ target_deploy_status:
     workload-status-message-regex: '^.*$'
   vault:
     workload-status: active
-    workload-status-message-regex: '^$'
+    workload-status-message-regex: '^.*$'
   tls-operator:
     workload-status: active
     workload-status-message-regex: '^$'