chore(.packit.yml): adding all fedora release + centos to packit

With this config change,copr builds will happen on pull requests
for all fedora development branches and the next major RHEL release
( fedora-eln ) and on commits, copr builds will happen on all fedora
release and the next major RHEL release.

.packit.yml

@@ -45,13 +45,16 @@ jobs:
   trigger: pull_request
   metadata:
     targets:
-      - fedora-rawhide
+      - fedora-development
+      - fedora-eln
 
 - job: copr_build
   trigger: commit
   metadata:
     targets:
-      - fedora-rawhide
+      - fedora-all
+      - fedora-development
+      - fedora-eln
     branch: master
     owner: "@dracut"
     project: Dracut