Disable OCI cache usage for jobs w/o install prefix "/esd"

Changes in CI file allow to use existing spack deployments w/o cache. Disables the use of the cache for all jobs that don't install packages to /esd/vendor/spack/opt/spack/… as we can't guarantee that the relocation will work (it is known that, e.g., R includes absolute paths to tools like which breaking any relocation atm).

.gitlab-ci.yml

@@ -16,7 +16,7 @@ variables:
 # start a k8s Job that will build the Spack environment
 .deploy-build-environment:
   variables:
-    OCI_CACHE_PREFIX: ${HARBOR_HOST}/${HARBOR_PROJECT}/${CI_COMMIT_BRANCH}
+    OCI_CACHE_PREFIX: ""
     UPDATE_SPACK_OCI_CACHES: false
   stage: build
   tags:
@@ -186,7 +186,7 @@ build-spack-env-on-runner:
   variables:
     SPACK_DEV_ENV: ebrains-dev
     SPACK_JOBS: 2
-    OCI_CACHE_PREFIX: ${HARBOR_HOST}/${HARBOR_PROJECT}/master
+    OCI_CACHE_PREFIX: ""
     UPDATE_SPACK_OCI_CACHES: false
   script:
     # deactivate environment views (we don't need them for the test build-job)
@@ -221,15 +221,15 @@ sync-gitlab-spack-instance:
   variables:
     SPACK_REPO_PATH: $SPACK_PATH_GITLAB/ebrains-spack-builds
     SPACK_JOBS: 4
-    OCI_CACHE_PREFIX: ${HARBOR_HOST}/${HARBOR_PROJECT}/${CI_COMMIT_BRANCH}
-    UPDATE_SPACK_OCI_CACHES: true
+    OCI_CACHE_PREFIX: ""
+    UPDATE_SPACK_OCI_CACHES: false
   script:
     - SPACK_NFS_ENV=${CI_COMMIT_BRANCH//./-}
     # create spack dir if it doesn't exist
     - mkdir -p $SPACK_PATH_GITLAB
     # get latest state of EBRAINS repo
     - rm -rf $SPACK_REPO_PATH && cp -r $CI_PROJECT_DIR $SPACK_REPO_PATH
-    # run installation script and set UPDATE to true
+    # run installation script
     - bash install_spack_env.sh $SPACK_JOBS $SPACK_PATH_GITLAB $SPACK_REPO_PATH $SPACK_NFS_ENV "" $UPDATE_SPACK_OCI_CACHES $OCI_CACHE_PREFIX
     # create kernel spec, so that the environment can be used in gitlab CI jobs
     - RELEASE_NAME=$(case $CI_COMMIT_BRANCH in experimental_rel) echo ebrains-experimental;; ebrains*) echo ${CI_COMMIT_BRANCH:0:10}.${CI_COMMIT_BRANCH:11};; *) echo $CI_COMMIT_BRANCH;; esac);
@@ -247,7 +247,7 @@ sync-gitlab-spack-instance:
       - spack_logs
     when: always
   rules:
-    # branches that update the gitlab-runner upstream (read-only) installation and the spack OCI caches
+    # branches that update the gitlab-runner upstream (read-only) installation
     - if: ($CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH || $CI_COMMIT_BRANCH == "experimental_rel" || $CI_COMMIT_BRANCH =~ /^ebrains/) && $CI_PROJECT_NAMESPACE =~ /platform\/esd/ && $CI_PIPELINE_SOURCE != "schedule"
       when: manual