Add Istio install values for e2e testing

e2e/istio-values.yaml

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+#
+# Minimal Istio Configuration required by Flagger
+#
+
+# pilot configuration
+pilot:
+  enabled: true
+  sidecar: true
+
+gateways:
+  enabled: false
+  istio-ingressgateway:
+    autoscaleMax: 1
+
+# citadel configuration
+security:
+  enabled: true
+
+# sidecar-injector webhook configuration
+sidecarInjectorWebhook:
+  enabled: true
+
+# galley configuration
+galley:
+  enabled: false
+
+# mixer configuration
+mixer:
+  policy:
+    enabled: false
+    replicaCount: 1
+    autoscaleEnabled: false
+  telemetry:
+    enabled: true
+    replicaCount: 1
+    autoscaleEnabled: false
+  resources:
+    requests:
+      cpu: 100m
+      memory: 128Mi
+
+# addon prometheus configuration
+prometheus:
+  enabled: true
+  scrapeInterval: 5s
+
+# addon jaeger tracing configuration
+tracing:
+  enabled: false
+
+# Common settings.
+global:
+  proxy:
+    # Resources for the sidecar.
+    resources:
+      requests:
+        cpu: 100m
+        memory: 128Mi
+      limits:
+        cpu: 2000m
+        memory: 128Mi
+  useMCP: false

e2e/workload.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podinfo
+  namespace: test
+  labels:
+    app: podinfo
+spec:
+  minReadySeconds: 5
+  revisionHistoryLimit: 5
+  progressDeadlineSeconds: 60
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: podinfo
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+      labels:
+        app: podinfo
+    spec:
+      containers:
+      - name: podinfod
+        image: quay.io/stefanprodan/podinfo:1.4.0
+        imagePullPolicy: IfNotPresent
+        ports:
+        - containerPort: 9898
+          name: http
+          protocol: TCP
+        command:
+        - ./podinfo
+        - --port=9898
+        - --level=info
+        - --random-delay=false
+        - --random-error=false
+        env:
+        - name: PODINFO_UI_COLOR
+          value: blue
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 2000m
+            memory: 512Mi
+          requests:
+            cpu: 100m
+            memory: 64Mi