ALBS-1073: Prepare new configs of the building artifacts generator for all arches for 8.8-beta & 9.2-beta

- Option `extra_files`

pungi-build.conf.j2

@@ -185,4 +185,22 @@ variant_as_lookaside = [
     {% endfor %}
 ]
 
+extra_files = [
+    ('^.*$', {
+        '*': [
+            {
+                "scm": "git",
+                "repo": "https://git.almalinux.org/rpms/almalinux-release.git",
+                "branch": "a{{ distribution_major_version }}",
+                "file": [
+                    'GPL',
+                    'EULA',
+                    'RPM-GPG-KEY-AlmaLinux-{{ distribution_major_version }}',
+                ],
+                "target": "",
+            }
+        ],
+    }),
+]
+
 productimg = False