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/download/defaults/main.yml

@@ -482,6 +482,8 @@ local_path_provisioner_image_repo: "{{ docker_image_repo }}/rancher/local-path-p
 local_path_provisioner_image_tag: "v0.0.14"
 ingress_nginx_controller_image_repo: "{{ quay_image_repo }}/kubernetes-ingress-controller/nginx-ingress-controller"
 ingress_nginx_controller_image_tag: "0.32.0"
+ingress_ambassador_image_repo: "{{ quay_image_repo }}/datawire/ambassador-operator"
+ingress_ambassador_image_tag: "v1.2.8"
 alb_ingress_image_repo: "{{ docker_image_repo }}/amazon/aws-alb-ingress-controller"
 alb_ingress_image_tag: "v1.1.8"
 cert_manager_version: "v0.11.1"
@@ -980,6 +982,15 @@ downloads:
     groups:
     - kube-node
 
+  ingress_ambassador_controller:
+    enabled: "{{ ingress_ambassador_enabled }}"
+    container: true
+    repo: "{{ ingress_ambassador_image_repo }}"
+    tag: "{{ ingress_ambassador_image_tag }}"
+    sha256: "{{ ingress_ambassador_digest_checksum|default(None) }}"
+    groups:
+    - kube-node
+
   ingress_alb_controller:
     enabled: "{{ ingress_alb_enabled }}"
     container: true