[Task]add apache and alibaba dubbo sdk examples #3925

[mahaitao617]

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 #4199 (9ec309c) into master (af3a590) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #4199      +/-   ##
============================================
- Coverage     70.48%   70.45%   -0.04%     
+ Complexity     7229     7218      -11     
============================================
  Files           969      969              
  Lines         27033    27033              
  Branches       2407     2407              
============================================
- Hits          19054    19045       -9     
- Misses         6522     6530       +8     
- Partials       1457     1458       +1     

Impacted Files	Coverage Δ
...n/httpclient/exception/ShenyuTimeoutException.java	0.00% <0.00%> (-33.34%)	⬇️
...controller/ShenyuClientHttpRegistryController.java	77.77% <0.00%> (-22.23%)	⬇️
...ruptor/RegisterClientServerDisruptorPublisher.java	52.94% <0.00%> (-11.77%)	⬇️
...yu/plugin/httpclient/AbstractHttpClientPlugin.java	40.00% <0.00%> (-1.43%)	⬇️
...henyu/admin/service/impl/UpstreamCheckService.java	62.66% <0.00%> (-1.34%)	⬇️

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