remove vault-manager unseal delay

Options for vault-manager were introduced to delay unsealing of
recovering vault server pods until the active vault server pod would
start sending heartbeats to the recovering pod.  The behavior of vault
server that prompted the change to vault-manager is no longer
observed with vault server version 1.13.1.

Remove the unsealWaitIntervals so that vault manager will unseal the
recovering server immediately.

Test Plan:
  PASS  HA tests, review pods logs, election status
  PASS  active server remains active when a pod recovers
  PASS  no evidence of election attempts in vault server logs
  PASS  tested also with statusCheckRate=.1 to minimize delay
        (default 5s gives a random-ish delay of 0-5 seconds)

Story: 2010393
Task: 48236

Depends-On: https://review.opendev.org/c/starlingx/vault-armada-app/+/884553

Change-Id: Ifd73970658d6ef7a0e0ca5844b2db81d94bdde9f
Signed-off-by: Michel Thebeau <michel.thebeau@windriver.com>

stx-vault-helm/stx-vault-helm/fluxcd-manifests/vault/vault-static-overrides.yaml

@@ -20,6 +20,7 @@ manager:
     - key: "node-role.kubernetes.io/control-plane"
       operator: "Exists"
       effect: "NoSchedule"
+  unsealWaitIntervals: 0
 injector:
   enabled: true
   nodeSelector: |