downloads: separate etcd and etcd_container (#13555)

Mixing two semantically distincts artefacts makes things harder to read
and to consume from other code.

Needed for clean filtering on container / file.

roles/kubespray_defaults/defaults/main/download.yml

@@ -373,19 +373,24 @@ node_feature_discovery_image_tag: "v{{ node_feature_discovery_version }}"
 
 downloads:
   etcd:
-    container: "{{ etcd_deployment_type != 'host' }}"
-    file: "{{ etcd_deployment_type == 'host' }}"
-    enabled: true
+    enabled: "{{ etcd_deployment_type == 'host' }}"
+    file: true
     dest: "{{ local_release_dir }}/etcd-{{ etcd_version }}-linux-{{ image_arch }}.tar.gz"
-    image_name: "{{ etcd_image_repo }}:{{ etcd_image_tag }}"
-    checksum: "{{ etcd_binary_checksum if etcd_deployment_type == 'host' else None }}"
+    checksum: "{{ etcd_binary_checksum }}"
     url: "{{ etcd_download_url }}"
-    unarchive: "{{ etcd_deployment_type == 'host' }}"
+    unarchive: true
     owner: "root"
     mode: "0755"
     groups:
       - etcd
 
+  etcd_container:
+    enabled: "{{ etcd_deployment_type != 'host' }}"
+    container: true
+    image_name: "{{ etcd_image_repo }}:{{ etcd_image_tag }}"
+    groups:
+      - etcd
+
   cni:
     enabled: true
     file: true