bug: does not update the files in the pod after modifying the configmap, resulting in the configuration not being hot-loaded.

### Current Behavior

因为目前使用了subPath,导致修改cm不会对pod中的文件不会被更新,导致apisix配置不会热加载,需要重启才能生效

解决版本,指定到一个目录,然后cm挂载到这个目录的config.yaml不使用subPath

### Expected Behavior

_No response_

### Error Logs

_No response_

### Steps to Reproduce

安装一个k8s环境然后使用helm安转一个apisix就可以了

### Environment

apisix 3.2.2
k8s环境

Inspect the APISIX Helm chart's ConfigMap volume mounts and the use of subPath. Reproduce the behavior in a Kubernetes environment by installing APISIX with Helm and modifying the ConfigMap; the work is done when the mounted configuration file updates in the pod and APISIX hot-loads the change without a restart.

Written by the indexing model from the issue text.