Make the healthy check end pointer work even if reaches the limitation `maxHttpServerConnections`

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.

### Motivation

`maxHttpServerConnections` protects the broker when there are many HTTP requests, but it also denies the healthy check call ("/status.html"). Leading the k8s kill the pod even if the broker is fine.

### Solution

_No response_

### Alternatives

_No response_

### Anything else?

_No response_

### Are you willing to submit a PR?

- [X] I'm willing to submit a PR!