Fix Javaassist ClassPool ClassPath

[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.
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[codecov-commenter]

Codecov Report

Merging #8828 (204561e) into 3.0 (b5190a6) will decrease coverage by 0.13%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                3.0    #8828      +/-   ##
============================================
- Coverage     63.78%   63.64%   -0.14%     
- Complexity      314      315       +1     
============================================
  Files          1160     1160              
  Lines         48898    48860      -38     
  Branches       7331     7302      -29     
============================================
- Hits          31189    31099      -90     
- Misses        14288    14328      +40     
- Partials       3421     3433      +12     

Impacted Files	Coverage Δ
...g/apache/dubbo/common/bytecode/ClassGenerator.java	62.43% <100.00%> (ø)
...java/org/apache/dubbo/common/bytecode/Wrapper.java	82.58% <100.00%> (ø)
.../dubbo/common/compiler/support/CtClassBuilder.java	60.71% <100.00%> (ø)
...ntext/event/AwaitingNonWebApplicationListener.java	60.56% <0.00%> (-22.54%)	⬇️
...ng/transport/dispatcher/WrappedChannelHandler.java	47.82% <0.00%> (-15.22%)	⬇️
...ng/transport/dispatcher/all/AllChannelHandler.java	68.96% <0.00%> (-13.80%)	⬇️
...ache/dubbo/remoting/transport/AbstractChannel.java	75.00% <0.00%> (-12.50%)	⬇️
...dubbo/common/status/support/LoadStatusChecker.java	50.00% <0.00%> (-11.54%)	⬇️
.../apache/dubbo/remoting/transport/AbstractPeer.java	58.69% <0.00%> (-10.87%)	⬇️
...moting/transport/netty4/NettyEventLoopFactory.java	22.22% <0.00%> (-7.78%)	⬇️
... and 43 more

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