Reenabling ppc64le build (#709)

Author: OlivierCazade

.tekton/network-observability-console-plugin-1-8-pull-request.yaml

@@ -31,6 +31,7 @@ spec:
   - name: build-platforms
     value:
     - linux/x86_64
+    - linux/ppc64le
   pipelineRef:
     name: build-pipeline
   taskRunTemplate: {}

.tekton/network-observability-console-plugin-1-8-push.yaml

@@ -29,6 +29,7 @@ spec:
   - name: build-platforms
     value:
     - linux/x86_64
+    - linux/ppc64le
   pipelineRef:
     name: build-pipeline
   taskRunTemplate: {}