Connection count of current node is not accurate

[Daydreamer-ia]

Describe the bug
A clear and concise description of what the bug is.

Expected behavior
The operation to update current node connection count metric need to be placed after ejecting connections.
更新长连接数指标应该放在弹出连接后。

Actually behavior
A clear and concise description of what you actually to happen.

How to Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See errors

Desktop (please complete the following information):

• OS: [e.g. Centos]
• Version [e.g. nacos-server 1.3.1, nacos-client 1.3.1]
• Module [e.g. naming/config]
• SDK [e.g. original, spring-cloud-alibaba-nacos, dubbo]

Additional context
Add any other context about the problem here.