[2.7] Add Dynamic Configuration Override Support For ServiceDiscovery

[AlbumenJ]

What is the purpose of the change

Brief changelog

Verifying this change

Checklist

• Make sure there is a GitHub_issue field 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.
• 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.
• Check if is necessary to patch to Dubbo 3 if you are work on Dubbo 2.7
• 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 sample in dubbo samples project.
• Add some description to dubbo-website project if you are requesting to add a feature.
• GitHub Actions works fine on your own branch.
• If this contribution is large, please follow the Software Donation Guide.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 11.49425% with 154 lines in your changes missing coverage. Please review.

Project coverage is 61.02%. Comparing base (ca794b6) to head (70e5b1d).

Files with missing lines	Patch %	Lines
...bo/registry/client/OverrideInstanceAddressURL.java	0.00%	84 Missing ⚠️
...stry/client/ServiceDiscoveryRegistryDirectory.java	22.72%	67 Missing and 1 partial ⚠️
...e/dubbo/registry/integration/RegistryProtocol.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #8389      +/-   ##
============================================
- Coverage     61.20%   61.02%   -0.18%     
- Complexity      446      448       +2     
============================================
  Files          1096     1097       +1     
  Lines         44223    44393     +170     
  Branches       6445     6469      +24     
============================================
+ Hits          27066    27092      +26     
- Misses        14176    14314     +138     
- Partials       2981     2987       +6     

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