Disable packit builds for centos-stream+epel-next-8

It's no longer an active release for the rhcontainerbot/podman-next COPR
at https://copr.fedorainfracloud.org/coprs/rhcontainerbot/podman-next/.

Add "adjustments to .packit.yaml" to the list of things we don't require
updated tests for.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

.packit.yaml

@@ -20,8 +20,6 @@ jobs:
       - fedora-all-aarch64
       - fedora-eln-x86_64
       - fedora-eln-aarch64
-      - centos-stream+epel-next-8-x86_64
-      - centos-stream+epel-next-8-aarch64
       - epel-9-x86_64
       - epel-9-aarch64
     additional_repos:

tests/validate/pr-should-include-tests

@@ -41,6 +41,7 @@ fi
 filtered_changes=$(git diff --name-status $base $head   |
                        awk '{print $2}'                 |
                        grep -F -vx .cirrus.yml          |
+                       grep -F -vx .packit.yaml         |
                        grep -F -vx .gitignore           |
                        grep -F -vx changelog.txt        |
                        grep -F -vx go.mod               |