support deep copy of default service instance

[chickenlj]

No description provided.

[codecov-commenter]

Codecov Report

Merging #9029 (e13294e) into 3.0 (87f869d) will decrease coverage by 0.14%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##                3.0    #9029      +/-   ##
============================================
- Coverage     63.32%   63.18%   -0.15%     
+ Complexity      314      312       -2     
============================================
  Files          1189     1189              
  Lines         50480    50480              
  Branches       7540     7520      -20     
============================================
- Hits          31968    31894      -74     
- Misses        15029    15089      +60     
- Partials       3483     3497      +14     

Impacted Files	Coverage Δ
.../client/metadata/ServiceInstanceMetadataUtils.java	92.15% <ø> (ø)
.../dubbo/registry/client/DefaultServiceInstance.java	84.74% <50.00%> (-1.70%)	⬇️
...ng/transport/dispatcher/all/AllChannelHandler.java	62.06% <0.00%> (-27.59%)	⬇️
...dubbo/common/status/support/LoadStatusChecker.java	46.15% <0.00%> (-15.39%)	⬇️
...ng/transport/dispatcher/WrappedChannelHandler.java	47.82% <0.00%> (-15.22%)	⬇️
...ache/dubbo/remoting/transport/AbstractChannel.java	75.00% <0.00%> (-12.50%)	⬇️
.../remoting/transport/netty4/NettyServerHandler.java	58.13% <0.00%> (-9.31%)	⬇️
.../common/threadpool/serial/SerializingExecutor.java	70.37% <0.00%> (-7.41%)	⬇️
.../remoting/transport/netty4/NettyClientHandler.java	58.62% <0.00%> (-6.90%)	⬇️
.../apache/dubbo/remoting/transport/AbstractPeer.java	54.34% <0.00%> (-6.53%)	⬇️
... and 29 more

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