[CI] Gitlab notification was missing for the RHEL8 stage

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

ci-scripts/Jenkinsfile-GitLab-Docker

@@ -217,6 +217,7 @@ pipeline {
           steps {
             lock (rem_rhel8_resource) {
               script {
+                gitlabCommitStatus(name: "Build RHEL8 AMF Image") {
                   if ("PUSH".equals(env.gitlabActionType)) {
                     // Currently this pipeline only runs for pushes to `develop` branch
                     // First clean image registry
@@ -242,6 +243,7 @@ pipeline {
                 }
               }
             }
+          }
           post {
             always {
               script {