[ISSUE #3450] add brpc integrated test

[loongs-zhang]

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #4319 (8ee80f4) into master (962277f) will decrease coverage by 0.11%.
The diff coverage is 17.24%.

@@             Coverage Diff              @@
##             master    #4319      +/-   ##
============================================
- Coverage     68.36%   68.25%   -0.11%     
+ Complexity     7514     7511       -3     
============================================
  Files          1020     1020              
  Lines         28813    28871      +58     
  Branches       2568     2579      +11     
============================================
+ Hits          19699    19707       +8     
- Misses         7579     7623      +44     
- Partials       1535     1541       +6     

Impacted Files	Coverage Δ
.../common/dto/convert/plugin/BrpcRegisterConfig.java	0.00% <0.00%> (ø)
...henyu/plugin/brpc/handler/BrpcMetaDataHandler.java	0.00% <0.00%> (ø)
...che/shenyu/plugin/brpc/proxy/BrpcProxyService.java	2.08% <0.00%> (+0.04%)	⬆️
...enyu/plugin/brpc/cache/ApplicationConfigCache.java	34.34% <13.15%> (-15.01%)	⬇️
...ache/shenyu/client/brpc/common/dto/BrpcRpcExt.java	30.00% <33.33%> (-1.82%)	⬇️
...client/brpc/BrpcContextRefreshedEventListener.java	70.00% <100.00%> (ø)
...in/java/org/apache/shenyu/common/dto/RuleData.java	74.44% <0.00%> (-11.27%)	⬇️
...enyu/admin/service/publish/RuleEventPublisher.java	10.20% <0.00%> (-2.00%)	⬇️
.../plugin/base/cache/CommonPluginDataSubscriber.java	72.64% <0.00%> (-1.40%)	⬇️
... and 7 more

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[JooKS-me]

Please add brpc-it to here,

shenyu/.github/workflows/integrated-test.yml

Line 31 in c02e215

- shenyu-integrated-test-grpc

[loongs-zhang]

sure, copy that.

[loongs-zhang]

There is a problem with the implementation of the brpc plugin. The brpc integration test will be supported in the next version.

[JooKS-me]

lgtm