Add log for server list manager and split constructor and start.

[KomachiSion]

Please do not create a Pull Request without creating an issue first.

What is the purpose of the change

For #12189

Brief changelog

XX

Verifying this change

XXXX

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• Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 84.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 70.94%. Comparing base (66feeec) to head (608ad7a).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...acos/client/address/AbstractServerListManager.java	77.77%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #12736      +/-   ##
=============================================
- Coverage      70.95%   70.94%   -0.02%     
- Complexity      9614     9623       +9     
=============================================
  Files           1275     1278       +3     
  Lines          41260    41206      -54     
  Branches        4375     4360      -15     
=============================================
- Hits           29277    29232      -45     
+ Misses          9894     9880      -14     
- Partials        2089     2094       +5     

Files with missing lines	Coverage Δ
...os/client/config/impl/ConfigServerListManager.java	72.46% <100.00%> (ø)
...acos/client/naming/NacosNamingMaintainService.java	100.00% <100.00%> (ø)
...os/client/naming/core/NamingServerListManager.java	76.00% <100.00%> (ø)
...lient/naming/remote/NamingClientProxyDelegate.java	95.52% <100.00%> (+0.06%)	⬆️
...acos/client/address/AbstractServerListManager.java	79.54% <77.77%> (ø)

... and 6 files with indirect coverage changes

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