ci: deactivate manifest test for rhel/centos9

A bug afflicts image-info on these distributions. We need to perform
modifications to the way image-info mounts the image to do its analyzis.
OSBuild needs some changes for that to happen:
- see https://github.com/osbuild/osbuild/pull/1182.
Since it will not be possible to land anything on OSBuild until
image-info is fixed, let's temporarily deactivate these two archs.

.gitlab-ci.yml

@@ -104,8 +104,6 @@ Manifests:
           - aws/fedora-36-aarch64
           - aws/centos-stream-8-x86_64
           - aws/centos-stream-8-aarch64
-          - aws/centos-stream-9-x86_64
-          - aws/centos-stream-9-aarch64
       - RUNNER:
           - aws/rhel-8.6-ga-x86_64
           - aws/rhel-8.6-ga-aarch64
@@ -113,8 +111,6 @@ Manifests:
           - aws/rhel-9.0-ga-aarch64
           - aws/rhel-8.7-nightly-x86_64
           - aws/rhel-8.7-nightly-aarch64
-          - aws/rhel-9.1-nightly-x86_64
-          - aws/rhel-9.1-nightly-aarch64
         INTERNAL_NETWORK: "true"
 
 finish: