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

.gitlab-ci.yml

@@ -4,7 +4,7 @@ variables:
   OSDU_GCP_HELM_CONFIG_SERVICE: register-config
   OSDU_GCP_HELM_DEPLOYMENT_SERVICE: register-deploy
   OSDU_GCP_HELM_CONFIG_SERVICE_VARS: "--set data.subscriber_private_key_id=$OSDU_GCP_SUBSCRIBER_PRIVATE_KEY_ID --set data.google_cloud_project=$OSDU_GCP_PROJECT --set data.google_audiences=$GOOGLE_AUDIENCE --set data.gcloud_region=$OSDU_GCP_REGION --set data.environment=$ENVIRONMENT --set data.records_change_pubsub_endpoint=$RECORDS_CHANGE_PUBSUB_ENDPOINT --set data.service_identity=$SERVICE_IDENTITY --set data.log_level=$OSDU_GCP_LOG_LEVEL"
-  OSDU_GCP_HELM_DEPLOYMENT_SERVICE_VARS: "--set data.image=$CI_REGISTRY_IMAGE/osdu-gcp:$CI_COMMIT_SHORT_SHA --set data.serviceAccountName=workload-identity-register"
+  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_PACKAGE_CHARTS: "devops/gcp/deploy devops/gcp/configmap"
 
   AWS_BUILD_SUBDIR: provider/register-aws/build-aws