feat: add DOKKU_QUIET_OUTPUT=1 to all config_set/config_unset calls

This makes build output a bit more digestable.

plugins/common/functions

@@ -678,7 +678,7 @@ dokku_receive() {
   local DOKKU_SKIP_CLEANUP="$(config_get "$APP" DOKKU_SKIP_CLEANUP || true)"
   docker_cleanup "$APP"
   dokku_log_info1 "Building $APP from $IMAGE_SOURCE_TYPE..."
-  config_set --no-restart "$APP" DOKKU_APP_TYPE="$IMAGE_SOURCE_TYPE" &>/dev/null
+  DOKKU_QUIET_OUTPUT=1 config_set --no-restart "$APP" DOKKU_APP_TYPE="$IMAGE_SOURCE_TYPE"
   dokku_build "$APP" "$IMAGE_SOURCE_TYPE" "$TMP_WORK_DIR"
   release_and_deploy "$APP"
 }