feat:upgrade nearby router and add namespace nearby router.

[fuyuwei01]

PR Type

Describe what this PR does for and how you did.

Adding the issue link (#xxx) if possible.

Note

Checklist

• Add information of this PR to CHANGELOG.md in root of project.
• Add documentation in javadoc or comment below the PR if necessary.

Checklist (Optional)

• Will pull request to branch of 2023.
• Will pull request to branch of 2022.
• Will pull request to branch of 2021.
• Will pull request to branch of 2020.
• Will pull request to branch of hoxton.

[codecov]

Codecov Report

Attention: Patch coverage is 46.87500% with 17 lines in your changes missing coverage. Please review.

Project coverage is 64.66%. Comparing base (378d034) to head (7c748b5).
Report is 3 commits behind head on 2021.

Files	Patch %	Lines
...g/properties/PolarisNamespaceRouterProperties.java	30.00%	7 Missing ⚠️
...interceptor/NamespaceRouterRequestInterceptor.java	33.33%	6 Missing ⚠️
...text/tsf/metadata/TsfInstanceMetadataProvider.java	0.00%	2 Missing ⚠️
...ntext/tsf/env/TsfCoreEnvironmentPostProcessor.java	0.00%	1 Missing ⚠️
...cement/transformer/PolarisInstanceTransformer.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               2021    #1374      +/-   ##
============================================
- Coverage     65.13%   64.66%   -0.47%     
  Complexity        2        2              
============================================
  Files           322      322              
  Lines          7620     7522      -98     
  Branches        938      911      -27     
============================================
- Hits           4963     4864      -99     
- Misses         2222     2246      +24     
+ Partials        435      412      -23     

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