Use Python 3.9 for integration tests on Rocky 8

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Changed the implementation of the lock for the image repository metadata file to a mechanism based on flock(2).
   The new implementation can support both shared locks (a.k.a. read locks) and exclusive locks (a.k.a. write locks),
   and improves the startup time when launching large numbers of containers at scale.
+- Updated CI integration tests on Rocky 8 to use Python 3.9, solving a problem of missing wheel packages for the previous Python version
 - Updated CI distributed tests to use Docker Compose V2 and Compose file format version 3
 - Updated automatic documentation build to use Sphinx 7.2.6 and Sphinx RTD Theme 2.0.0
 

CI/installation/install_packages_rocky:8.sh

@@ -8,7 +8,7 @@ sudo dnf config-manager --set-enabled powertools
 sudo dnf install -y gcc gcc-c++ glibc-static libstdc++-static git make cmake autoconf \
     diffutils findutils wget which procps squashfs-tools zlib-devel zlib-static \
     boost-devel skopeo runc tini-static \
-    python3 python3-pip python3-setuptools platform-python-devel
+    python39 python39-pip python39-setuptools platform-python-devel
 sudo dnf clean all
 sudo rm -rf /var/cache/dnf