Ensure repo files don't get re-enabled in later steps

Author: m-bull

elements/rocky-container-stackhpc/containerfiles/9-stackhpc

@@ -7,7 +7,7 @@ ARG ROCKY_MIRROR_URLS
 
 RUN if [[ ${ROCKY_USE_MIRRORS} = "true" ]]; then \
     dnf -y install 'dnf-command(config-manager)' && \
-    mkdir /tmp/orig_repos && mv -f /etc/yum.repos.d/* /tmp/orig_repos/ && \
+    dnf config-manager --set-disabled '*' && \
     for REPO_URL in $(echo ${ROCKY_MIRROR_URLS} | sed "s/,/ /g"); do \
         dnf config-manager --add-repo ${REPO_URL}; done && \
     dnf --allowerasing -y distro-sync; fi