scaleway: Introduce scaleway_image_facts module

Co-authored-by: Rémy Leone <rleone@online.net>

test/legacy/roles/scaleway_image_facts/tasks/main.yml

@@ -0,0 +1,12 @@
+- name: Get image informations and register it in a variable
+  scaleway_image_facts:
+  register: images
+
+- name: Display images variable
+  debug:
+    var: images
+
+- name: Ensure retrieval of images facts is success
+  assert:
+    that:
+      - images is success