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/ingress.yaml

@@ -0,0 +1,18 @@
+apiVersion: networking.k8s.io/v1beta1
+kind: Ingress
+metadata:
+  name: nginx-ingress
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /
+spec:
+  rules:
+  - http:
+      paths:
+      - path: /testpath
+        backend:
+          serviceName: nginx-service
+          servicePort: 80
+      - path: /testpath2
+        backend:
+          serviceName: unrouted-service
+          servicePort: 80