[ISSUE #13023]Add Unit Test for ConfigQueryHandlerChainn and optimize the logic

[Sunrisea]

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

What is the purpose of the change

fix #13023, Add Unit Test for ConfigQueryHandlerChain and handlers, fix the logic of SpecialTagNotFoundHandler, add ConfigContentTypeHandler

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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• [*] 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.
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[github-actions]

Thanks for your this PR. 🙏
Please check again for your PR changes whether contains any usage/api/configuration change such as Add new API , Add new configuration, Change default value of configuration.
If so, please add or update documents(markdown type) in docs/next/ for repository nacos-group/nacos-group.github.io

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感谢您提交的PR。 🙏
请再次查看您的PR内容，确认是否包含任何使用方式/API/配置参数的变更，如：新增API、新增配置参数、修改默认配置等操作。
如果是，请确保在提交之前，在仓库nacos-group/nacos-group.github.io中的docs/next/目录下添加或更新文档（markdown格式）。

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 86.95652% with 6 lines in your changes missing coverage. Please review.

Project coverage is 72.36%. Comparing base (3796395) to head (61c9a3c).

Files with missing lines	Patch %	Lines
...s/config/server/controller/ConfigServletInner.java	75.00%	3 Missing and 2 partials ⚠️
...ervice/query/handler/ConfigContentTypeHandler.java	91.66%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #13024      +/-   ##
=============================================
+ Coverage      72.31%   72.36%   +0.04%     
- Complexity     10005    10024      +19     
=============================================
  Files           1309     1310       +1     
  Lines          41993    42004      +11     
  Branches        4407     4413       +6     
=============================================
+ Hits           30369    30396      +27     
+ Misses          9497     9486      -11     
+ Partials        2127     2122       -5     

Files with missing lines	Coverage Δ
...onfig/server/remote/ConfigQueryRequestHandler.java	85.00% <100.00%> (+0.25%)	⬆️
...e/query/DefaultConfigQueryHandlerChainBuilder.java	100.00% <100.00%> (ø)
...vice/query/handler/AbstractConfigQueryHandler.java	100.00% <100.00%> (+25.00%)	⬆️
...ig/server/service/query/handler/FormalHandler.java	100.00% <100.00%> (+5.26%)	⬆️
...er/service/query/handler/GrayRuleMatchHandler.java	100.00% <100.00%> (+7.40%)	⬆️
...rvice/query/handler/SpecialTagNotFoundHandler.java	100.00% <ø> (+4.76%)	⬆️
.../service/query/model/ConfigQueryChainResponse.java	61.40% <100.00%> (+7.69%)	⬆️
...ervice/query/handler/ConfigContentTypeHandler.java	91.66% <91.66%> (ø)
...s/config/server/controller/ConfigServletInner.java	72.51% <75.00%> (-2.09%)	⬇️

... and 4 files with indirect coverage changes

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[wuyfee]

$\color{green}{SUCCESS}$
DETAILS
✅ - docker: success
✅ - deploy (standalone & cluster & standalone_auth): success
✅ - e2e-java-test (standalone & cluster & standalone_auth): success
✅ - e2e-go-test (standalone & cluster): success
✅ - e2e-cpp-test (standalone & cluster): success
✅ - e2e-csharp-test (standalone & cluster): success
✅ - e2e-nodejs-test (standalone & cluster): success
✅ - e2e-python-test (standalone & cluster): success
✅ - clean (standalone & cluster & standalone_auth): success

[wuyfee]

$\color{green}{SUCCESS}$
DETAILS
✅ - docker: success
✅ - deploy (standalone & cluster & standalone_auth): success
✅ - e2e-java-test (standalone & cluster & standalone_auth): success
✅ - e2e-go-test (standalone & cluster): success
✅ - e2e-cpp-test (standalone & cluster): success
✅ - e2e-csharp-test (standalone & cluster): success
✅ - e2e-nodejs-test (standalone & cluster): success
✅ - e2e-python-test (standalone & cluster): success
✅ - clean (standalone & cluster & standalone_auth): success