Try an US mirror for OpenEuler

Given that public runners are hosted in US
https://github.com/orgs/community/discussions/24969

Author: RazvanLiviuVarzaru

ci_build_images/centos.Dockerfile

@@ -9,7 +9,9 @@ LABEL maintainer="MariaDB Buildbot maintainers"
 
 # Install updates and required packages
 # hadolint ignore=SC2086
-RUN dnf -y install 'dnf-command(config-manager)' \
+RUN source /etc/os-release \
+    && if [ "$ID" == "openEuler" ]; then sed -i 's#http://repo.openeuler.org#https://mirrors.ocf.berkeley.edu/openeuler#g' /etc/yum.repos.d/openEuler.repo; fi \ 
+    && dnf -y install 'dnf-command(config-manager)' \
     && source /etc/os-release \
     && ARCH=$(rpm --query --queryformat='%{ARCH}' rpm) \
     && case "$PLATFORM_ID" in \
@@ -43,7 +45,6 @@ RUN dnf -y install 'dnf-command(config-manager)' \
           # remove . from between the version to correspond to
           # the galera repository name.
           VERSION_ID=-${VERSION_ID%.*}${VERSION_ID#*.}; \
-          sed -i 's#http://repo.openeuler.org#https://mirrors.dotsrc.org/openeuler#g' /etc/yum.repos.d/openEuler.repo; \
           ;; \
         "rocky") \
           ID=rockylinux; \