Update GKE SA to follow common naming convention [GONRG-4113]

.gitlab-ci.yml

@@ -5,7 +5,7 @@ variables:
   OSDU_GCP_HELM_CONFIG_DIR: "devops/gcp/configmap"
   OSDU_GCP_HELM_NAMESPACE: "default"
   OSDU_GCP_HELM_CONFIG_SERVICE_VARS: " --set data.log_level=$OSDU_GCP_LOG_LEVEL --set data.app_project=$OSDU_GCP_PROJECT --set data.app_googleaudience=$GOOGLE_AUDIENCE --set data.google_audiences=$GOOGLE_AUDIENCE --set data.app_register=$OSDU_GCP_REGISTER_API"
-  OSDU_GCP_HELM_DEPLOYMENT_SERVICE_VARS: "--set data.image=$CI_REGISTRY_IMAGE/osdu-gcp:$CI_COMMIT_SHORT_SHA --set data.serviceAccountName=workload-identity-notification"
+  OSDU_GCP_HELM_DEPLOYMENT_SERVICE_VARS: "--set data.image=$CI_REGISTRY_IMAGE/osdu-gcp:$CI_COMMIT_SHORT_SHA --set data.serviceAccountName=$OSDU_GCP_SERVICE-k8s"
   OSDU_GCP_HELM_CONFIG_SERVICE: "notification-config"
   OSDU_GCP_HELM_DEPLOYMENT_SERVICE: "notification-deploy"
   OSDU_GCP_HELM_PACKAGE_CHARTS: "devops/gcp/deploy devops/gcp/configmap"