backport to 1.18.5 - centos logic to point to vault.centos.org for centos:7 since it is EOL (#21891)

backport centos logic to point to vault.centos.org for centos:7 since it is EOL

Co-authored-by: github-team-consul-core <github-team-consul-core@hashicorp.com>

.github/scripts/verify_rpm.sh

@@ -10,6 +10,10 @@ set -euo pipefail
 # report why it failed. This is meant to be run as part of the build workflow to verify the built
 # .rpm meets some basic criteria for validity.
 
+# Notably, CentOS 7 is EOL, so we need to point to the vault for updates. It's not clear what alternative
+# we may use in the future that supports linux/386 as the platform was dropped in CentOS 8+9. The docker_image
+# is passed in as the third argument so that the script can determine if it needs to point to the vault for updates.
+
 # set this so we can locate and execute the verify_bin.sh script for verifying version output
 SCRIPT_DIR="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
 
@@ -20,6 +24,7 @@ function usage {
 function main {
   local rpm_path="${1:-}"
   local expect_version="${2:-}"
+  local docker_image="${3:-}"
   local got_version
 
   if [[ -z "${rpm_path}" ]]; then
@@ -34,6 +39,12 @@ function main {
     exit 1
   fi
 
+  if [[ -z "${docker_image}" ]]; then
+    echo "ERROR: docker image argument is required"
+    usage
+    exit 1
+  fi
+
   # expand globs for path names, if this fails, the script will exit
   rpm_path=$(echo ${rpm_path})
 
@@ -43,6 +54,12 @@ function main {
     exit 1
   fi
 
+  # CentOS 7 is EOL, so we need to point to the vault for updates
+  if [[ "$docker_image" == *centos:7 ]]; then
+    sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
+    sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
+  fi
+
   yum -y clean all
   yum -y update
   yum -y install which openssl