Support for Ambassador OSS as an Ingress (#6135)

Support for Ambassador OSS as an Ingress Controller when
settings `ingress_ambassador_enabled: true`.

Signed-off-by: Alvaro Saurin <alvaro.saurin@gmail.com>

roles/kubernetes-apps/ingress_controller/ambassador/templates/deploy-ambassador.yml.j2

@@ -0,0 +1,43 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ambassador-operator
+  namespace: {{ ingress_ambassador_namespace }}
+  labels:
+    app.kubernetes.io/name: ambassador-operator
+    app.kubernetes.io/part-of: ambassador-operator
+    getambassador.io/installer: operator
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      name: ambassador-operator
+      app.kubernetes.io/name: ambassador-operator
+      app.kubernetes.io/part-of: ambassador-operator
+  template:
+    metadata:
+      labels:
+        name: ambassador-operator
+        getambassador.io/installer: operator
+        app.kubernetes.io/name: ambassador-operator
+        app.kubernetes.io/part-of: ambassador-operator
+    spec:
+      serviceAccountName: ambassador-operator
+      containers:
+        - name: ambassador-operator
+          image: {{ ingress_ambassador_image_repo }}:{{ ingress_ambassador_image_tag }}
+          command:
+          - ambassador-operator
+          imagePullPolicy: Always
+          env:
+            - name: WATCH_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+            - name: OPERATOR_NAME
+              value: "ambassador-operator"