Add Minikube integration testing workflow (#160)

Move integration testing into pull_request action that is isolated to an action runner using minikube

Co-authored-by: David Gamero <davidgamero@microsoft.com>

test/integration/test-chart/templates/service.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1 
+kind: Service 
+metadata: 
+  name: nginx-service
+spec: 
+  selector: 
+    app: nginx
+  ports: 
+  - protocol: TCP 
+    port: 80 
+    targetPort: 80