Nacos客户端磁盘降级需求 issues:11053

[guozongkang]

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

What is the purpose of the change

#11053

Brief changelog

1.使用磁盘来实现Nacos客户端降级方案
2.可以修改机器上的文件，开启或关闭降级，并且指定需要降级的服务
3.查询机器列表时，优先走降级逻辑

Verifying this change

XXXX

Follow this checklist to help us incorporate your contribution quickly and easily:

• 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.
• Format the pull request title like [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in test module.
• Run mvn -B clean package apache-rat:check findbugs:findbugs -Dmaven.test.skip=true to make sure basic checks pass. Run mvn clean install -DskipITs to make sure unit-test pass. Run mvn clean test-compile failsafe:integration-test to make sure integration-test pass.

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

Merging #11207 (de60b8a) into develop (76861a9) will increase coverage by 6.18%.
Report is 84 commits behind head on develop.
The diff coverage is 27.02%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #11207      +/-   ##
=============================================
+ Coverage      54.06%   60.25%   +6.18%     
- Complexity      5509     5854     +345     
=============================================
  Files            893      892       -1     
  Lines          28525    26914    -1611     
  Branches        3160     2765     -395     
=============================================
+ Hits           15423    16217     +794     
+ Misses         11757     9584    -2173     
+ Partials        1345     1113     -232     

Files	Coverage Δ
...ba/nacos/client/naming/backups/FailoverSwitch.java	66.66% <66.66%> (ø)
...acos/client/naming/backups/NamingFailoverData.java	0.00% <0.00%> (ø)
...libaba/nacos/client/naming/utils/CacheDirUtil.java	50.00% <50.00%> (ø)
...libaba/nacos/client/naming/NacosNamingService.java	87.41% <60.00%> (-3.32%)	⬇️
...a/nacos/client/naming/cache/ServiceInfoHolder.java	77.98% <55.00%> (+0.78%)	⬆️
...baba/nacos/client/naming/backups/FailoverData.java	0.00% <0.00%> (ø)
...a/nacos/client/naming/backups/FailoverReactor.java	36.00% <22.66%> (-0.37%)	⬇️
...ing/backups/datasource/DiskFailoverDataSource.java	13.69% <13.69%> (ø)

... and 163 files with indirect coverage changes

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[KomachiSion]

Will be merged after 2.3.0 released.