[Backport release-0.38] [dashboard] Add config hash annotations to restart pods on config changes (#1665)

# Description
Backport of #1662 to `release-0.38`.

packages/system/dashboard/templates/nginx.yaml

@@ -16,7 +16,7 @@ spec:
   template:
     metadata:
       annotations:
-        checksum/configmap-configurationnginxfile: 258c66b019c8c7f4a5d0a78dfd7bf297ce486b213346fbd2879c466abfc377e0
+        checksum/config: {{ include (print $.Template.BasePath "/nginx-config.yaml") . | sha256sum }}
       labels:
         app.kubernetes.io/instance: incloud-web
         app.kubernetes.io/name: nginx

packages/system/dashboard/templates/web.yaml

@@ -15,7 +15,8 @@ spec:
     type: RollingUpdate
   template:
     metadata:
-      annotations: null
+      annotations:
+        checksum/config: {{ include (print $.Template.BasePath "/configmap.yaml") . | sha256sum }}
       labels:
         app.kubernetes.io/instance: incloud-web
         app.kubernetes.io/name: web