feat: add aubbo_configcenter_apollo_removeListener_test

[luox2]

What is the purpose of the change

Add unit test for ApolloDynamicConfiguration #7892

Brief changelog

Update org/apache/dubbo/configcenter/support/apollo/ApolloDynamicConfiguration.java file

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

Merging #7893 (6637a0a) into master (49e6701) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #7893      +/-   ##
============================================
- Coverage     59.61%   59.61%   -0.01%     
  Complexity      556      556              
============================================
  Files          1088     1088              
  Lines         43847    43855       +8     
  Branches       6400     6404       +4     
============================================
+ Hits          26141    26145       +4     
+ Misses        14804    14793      -11     
- Partials       2902     2917      +15     

Impacted Files	Coverage Δ
...ng/transport/dispatcher/all/AllChannelHandler.java	82.75% <0.00%> (-13.80%)	⬇️
...dubbo/remoting/exchange/support/DefaultFuture.java	80.34% <0.00%> (-11.12%)	⬇️
...che/dubbo/remoting/transport/mina/MinaChannel.java	35.52% <0.00%> (-10.53%)	⬇️
.../apache/dubbo/rpc/protocol/AsyncToSyncInvoker.java	62.06% <0.00%> (-10.35%)	⬇️
...ting/exchange/support/header/HeartbeatHandler.java	90.69% <0.00%> (-2.33%)	⬇️
...a/org/apache/dubbo/monitor/dubbo/DubboMonitor.java	86.66% <0.00%> (-1.91%)	⬇️
...pache/dubbo/registry/support/AbstractRegistry.java	78.14% <0.00%> (-1.49%)	⬇️
...apache/dubbo/common/constants/CommonConstants.java	100.00% <0.00%> (ø)
...g/apache/dubbo/registry/consul/ConsulRegistry.java	60.58% <0.00%> (+0.58%)	⬆️
...he/dubbo/registry/multicast/MulticastRegistry.java	68.37% <0.00%> (+0.93%)	⬆️
... and 5 more

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