Make roles to fetch and backup stratums to reduce duplicate code

roles/fetch-stratum/tasks/main.yaml

@@ -1,8 +1,11 @@
-- name: fetch alpine linux
-  ansible.builtin.shell:
-    cmd: brl remove -d alpine; brl fetch alpine
-
-- name: fetch arch linux
-  ansible.builtin.shell:
-    cmd: brl remove -d arch; brl fetch arch
+- name: Fetch new alpine strata
+  include_role:
+    name: fetch-strata
+  vars:
+    strata: alpine
 
+- name: Fetch new arch linux
+  include_role:
+    name: fetch-strata
+  vars:
+    strata: arch