Merge branch 'gc-add-variable' into 'master'

GONRG-7648: add variable

See merge request !756

(cherry picked from commit f93e5c7a)

2203ec8c GONRG-7648: add variable

devops/gc/pipeline/override-stages.yml

@@ -39,3 +39,7 @@ gc-containerize-bootstrap-gcr:
     - !reference [.gc_define_DATA_BRANCH, script]
     - gcloud auth activate-service-account --key-file=${GC_BAREMETAL_DEPLOY_FILE}
     - gcloud auth configure-docker gcr.io
+
+gc-dev2-test:
+  variables:
+    DATA_ROOT_TESTER: $GC_DEV2_DATA_ROOT_CLIENT_ID