Add label platform/application to pods

Add support to 'app.starlingx.io/component' to be overwritten
by user override, with possible values being 'platform' and
'application'. With 'platform' being the default value. This
change will also restart the pods if the label changes.

Test Plan:
PASS: upload/apply/remove/delete/update ptp-notification.
PASS: Install ptp-notification and check if pods have the label
'app.starlingx.io/component' with the value 'platform'.
PASS: Change the value of the labels.isApplication to true using
"system helm-override-update" and check, if after re-applying
the app, the label 'app.starlingx.component' changes to
application' in the pods.
PASS: Use 'system application-apply ptp-notification' when there is
a change to be applied to 'app.starlingx.component' and verify if the
pod is restarted.
PASS: If "labels.isApplication" is updated with a value other than
true or false, the label on the pods "app.starlingx.io/component"
will not change.

Story: 2010612
Task: 49132

Change-Id: I2f8586cbb7ceac75892af41b7120db6c189cdafa
Signed-off-by: David Barbosa Bastos <david.barbosabastos@windriver.com>

stx-ptp-notification-helm/stx-ptp-notification-helm/helm-charts/ptp-notification/templates/daemonset.yaml

@@ -24,6 +24,10 @@ spec:
       labels:
         app: {{ include "notification.name" . }}
         release: {{ .Release.Name }}
+        app.starlingx.io/component: {{ ternary "application" "platform" .Values.labels.isApplication}}
+      annotations: {
+        configchecksum: {{ toYaml .Values.labels | sha256sum | trunc 63 }}
+      }
     spec:
       imagePullSecrets:
       - name: {{ .Values.ptptracking.imagePullSecrets}}

stx-ptp-notification-helm/stx-ptp-notification-helm/helm-charts/ptp-notification/templates/deployment.yaml

@@ -20,6 +20,10 @@ spec:
     metadata:
       labels:
         app: rabbitmq
+        app.starlingx.io/component: {{ ternary "application" "platform" .Values.labels.isApplication}}
+      annotations: {
+        configchecksum: {{ toYaml .Values.labels | sha256sum | trunc 63 }}
+      }
     spec:
       imagePullSecrets:
       - name: {{ .Values.registration.imagePullSecrets }}

stx-ptp-notification-helm/stx-ptp-notification-helm/helm-charts/ptp-notification/values.yaml

@@ -19,6 +19,9 @@ fullnameOverride: ""
 global:
   namespace: notification
 
+labels:
+  isApplication: false
+
 registration:
   imagePullSecrets: default-registry-key
   image: