Fix reference cache key collision for different registries

[somiljain2006]

What is the purpose of the change?

This change appends the registry ID to the reference cache key, preventing cache collisions between references with the same interface, group, and version but different registry configurations, and ensuring requests are routed to the intended registry.

Fixes #15761

Checklist

• Make sure there is a GitHub_issue field for the change.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit tests to verify your logic correction. If the new feature or significant change is committed, please remember to adda sample in the dubbo samples project.
• Make sure GitHub actions can pass. Why the workflow is failing and how to fix it?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.75%. Comparing base (a3a35b5) to head (ce9c702).

Files with missing lines	Patch %	Lines
...pache/dubbo/config/utils/SimpleReferenceCache.java	75.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##                3.3   #15918   +/-   ##
=========================================
  Coverage     60.74%   60.75%           
  Complexity    11702    11702           
=========================================
  Files          1938     1938           
  Lines         88694    88699    +5     
  Branches      13387    13390    +3     
=========================================
+ Hits          53879    53890   +11     
+ Misses        29291    29281   -10     
- Partials       5524     5528    +4     

Flag	Coverage Δ
integration-tests-java21	32.41% <50.00%> (+0.04%)	⬆️
integration-tests-java8	32.45% <50.00%> (-0.08%)	⬇️
samples-tests-java21	32.06% <75.00%> (+0.04%)	⬆️
samples-tests-java8	29.73% <50.00%> (+0.03%)	⬆️
unit-tests-java11	59.05% <75.00%> (+<0.01%)	⬆️
unit-tests-java17	58.53% <75.00%> (+<0.01%)	⬆️
unit-tests-java21	58.52% <75.00%> (+<0.01%)	⬆️
unit-tests-java25	58.48% <75.00%> (+0.01%)	⬆️
unit-tests-java8	59.03% <75.00%> (-0.02%)	⬇️

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