Change health check path to manila-api deployment

"/" path causes readiness probe warning.
Change to use "healthcheck" api provided by manila.

story: 2011373
task: 51769
Change-Id: I6a720dd2863b6da256bd6f0466c5a2409333f5e9

manila/templates/deployment-api.yaml

@@ -82,7 +82,7 @@ spec:
           readinessProbe:
             httpGet:
               scheme: HTTP
-              path: /
+              path: {{ tuple "share" "healthcheck" "" . | include "helm-toolkit.endpoints.keystone_endpoint_path_lookup" }}
               port: {{ tuple "share" "service" "api" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
           volumeMounts:
             - name: pod-tmp

manila/values.yaml

@@ -955,6 +955,7 @@ endpoints:
       default: null
     path:
       default: '/v1'
+      healthcheck: /healthcheck
     scheme:
       default: http
       service: http