[k8s] - fix: correct the config file path for region-specific settings (

#9408)

- Change the config file extension from .yaml to .env for regional configurations

k8s/cloud-build_tmp.sh

@@ -49,7 +49,7 @@ fi
 cd "$WORKING_DIR"
 
 # Load region-specific config
-CONFIG_FILE=".github/configs/${REGION}.yaml"
+CONFIG_FILE=".github/configs/.env.${REGION}"
 if [ ! -f "$CONFIG_FILE" ]; then
     echo "Error: Config file not found: $CONFIG_FILE"
     exit 1