springcloudgateway 整合 sentinel，排除指定url，不作为sentinel资源

## Issue Description

在SpringCloudGateway项目中，引入Sentinel。目前将SpringCloudGateway部署在K8s环境中，发现K8S定期的健康检查也被作为sentinel资源统计进Sentinel DasbBoard中。怎么将指定的请求排除在Sentinel统计资源之外。

这样的需求，在一般的SpringBoot项目中，可以通过UrlCleaner实现，在SpringCloudGateway中怎么优雅解决？

Review the SpringCloudGateway and Sentinel integration, starting with the path that registers gateway requests as Sentinel resources. Determine how specified URLs, including Kubernetes health checks, can be excluded without affecting other requests. Done means excluded URLs no longer appear as Sentinel resources in the Dashboard; the issue provides no repository file or test to run.

Written by the indexing model from the issue text.