Is your feature request related to a problem? Please describe.
When nacos-server fails to start, the http client should be shut down to release related resources.

Describe the solution you'd like

1. Add the shutdown all http client method in HttpClientBeanHolder.

2. Call HttpClientBeanHolder#shutdown in the StartingSpringApplicationRunListener#failed method to shut down all http clients.

Describe alternatives you've considered

Additional context