Add label component=platform to pods

Add the label "app.starlingx.io/component=platform" to pods
to ensure kubernetes run it on the platform cores.

Additionally, the review [1] introduced a problem when
changing the chdir path in the trident install task.
This resulted in the installer being unable to locate
the custom templates.

[1]: https://review.opendev.org/c/starlingx/ansible-playbooks/+/887424/13/playbookconfig/src/playbooks/roles/k8s-storage-backends/netapp/tasks/main.yml#86

Test Plan:
PASS: Install trident
PASS: Check if pods have the label
'app.starlingx.io/component' with the value 'platform'

Story: 2010612
Task: 50258

Change-Id: I051c328edddf5b997c192e96f9be4ed34743b554
Signed-off-by: Erickson Silva de Oliveira <Erickson.SilvadeOliveira@windriver.com>

playbookconfig/src/playbooks/roles/k8s-storage-backends/netapp/tasks/main.yml

@@ -83,7 +83,7 @@
 - name: Install trident services
   command: tridentctl -n {{ trident_namespace }} install --use-custom-yaml {{ trident_install_extra_params }}
   args:
-    chdir: "{{ trident_setup_dir }}/setup"
+    chdir: "{{ trident_setup_dir }}"
   environment:
     KUBECONFIG: "/etc/kubernetes/admin.conf"
   when: (tridentctl_rest_response.rc is defined and

playbookconfig/src/playbooks/roles/k8s-storage-backends/netapp/templates/trident-daemonset.yaml.j2

@@ -14,6 +14,8 @@ spec:
     metadata:
       labels:
         app: node.csi.trident.netapp.io
+        # STX_change: add label component
+        app.starlingx.io/component: platform
     spec:
       serviceAccount: trident-node-linux
       hostNetwork: true

playbookconfig/src/playbooks/roles/k8s-storage-backends/netapp/templates/trident-deployment.yaml.j2

@@ -17,6 +17,8 @@ spec:
     metadata:
       labels:
         app: controller.csi.trident.netapp.io
+        # STX_change: add label component
+        app.starlingx.io/component: platform
     spec:
       serviceAccount: trident-controller
       containers: