Changing builder image in ci pipeline

Bug Description

Following the OTG0154122 The old docker-image-builder is no longer working properly. As immaediate effect the cern-drupal-distribution pipeline cannot build anymore new images.

CERN Gitlab team suggest to use the kaniko image.

Solution implemented

In this MR the gitlac_ci.yml file has been modified to accomodate such changes following the guidelines provided below https://gitlab.cern.ch/gitlabci-examples/build_docker_image/-/blob/master/.gitlab-ci.yml?ref_type=heads#L19

In particular the image has been changed from name: gitlab-registry.cern.ch/ci-tools/docker-image-builder to name: gcr.io/kaniko-project/executor:debug

.gitlab-ci.yml

@@ -16,11 +16,9 @@ stages:
       # Prepare Kaniko configuration file
     - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
      # Build and push the image from the Dockerfile at the root of the project.
-    - /kaniko/executor --context "$CI_PROJECT_DIR/$CONTEXT_DIR" --dockerfile "$CI_PROJECT_DIR/$CONTEXT_DIR/$DOCKERFILE" 
-      --destination "${CI_REGISTRY_IMAGE}/${IMAGE_NAME}:${TAG}" $BUILD_ARGS
+    - /kaniko/executor --context "$CI_PROJECT_DIR/$CONTEXT_DIR" --dockerfile "$CI_PROJECT_DIR/$CONTEXT_DIR/$DOCKERFILE" --destination "${IMAGE_DESTINATION}" $BUILD_ARGS
       # Print the full registry path of the pushed image
-    - echo "Image pushed to ${CI_REGISTRY_IMAGE}/${IMAGE_NAME}:${TAG}"
-    - echo "${IMAGE_DESTINATION}"
+    - echo "Image pushed to ${IMAGE_DESTINATION}"
 
 environment:
   stage: environment