Override "after" key deprecated by "dependent_apps"

Adjust the metadata.yaml of the kubernetes-power-manager application to
no longer use the after key and instead use the "dependent_apps" key.

This new feature installs the NFD app if you need to install
kubernetes-power-manager and NFD is not already installed.

Test Plan:
PASS: build-pkgs && build-image
PASS: fresh install AIO-SX
PASS: Upload, remove, apply and delete kubernetes-power-manager app
PASS: Update and rollback kubernetes-power-manager app
PASS: NFD was triggered to upload and apply automatically after the
      kubernetes-power-manager apply process started.

Story: 2011351
Task: 52348

Depends-On: https://review.opendev.org/c/starlingx/config/+/952863

Change-Id: Icb770c49f7ff5f48999624e4ccc29a30eb0148db
Signed-off-by: David Bastos <david.barbosabastos@windriver.com>

stx-kubernetes-power-manager/stx-kubernetes-power-manager/files/metadata.yaml

@@ -18,9 +18,11 @@ supported_k8s_version:
 behavior:
   platform_managed_app: yes
   evaluate_reapply:
-    after:
-    - node-feature-discovery
-
     triggers:
     - type: host-label-assign
     - type: host-modify
+
+dependent_apps:
+  - name: node-feature-discovery
+    version: 25\.09-\d+
+    action: apply