[3.0-Triple] Add multiple instance support for wire protocol

[guohao]

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 #8736 (368c57d) into 3.0 (13c15fd) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                3.0    #8736      +/-   ##
============================================
+ Coverage     63.71%   63.76%   +0.05%     
- Complexity      313      314       +1     
============================================
  Files          1145     1145              
  Lines         48183    48184       +1     
  Branches       7255     7255              
============================================
+ Hits          30698    30723      +25     
+ Misses        14115    14104      -11     
+ Partials       3370     3357      -13     

Impacted Files	Coverage Δ
...java/org/apache/dubbo/remoting/api/Connection.java	71.56% <100.00%> (ø)
...ache/dubbo/remoting/api/PortUnificationServer.java	81.53% <100.00%> (ø)
...bbo/remoting/api/PortUnificationServerHandler.java	65.62% <100.00%> (+1.10%)	⬆️
...he/dubbo/rpc/protocol/tri/TripleHttp2Protocol.java	97.29% <100.00%> (ø)
...n/java/org/apache/dubbo/common/utils/NetUtils.java	68.89% <0.00%> (-0.34%)	⬇️
...apache/dubbo/common/extension/ExtensionLoader.java	81.06% <0.00%> (+0.19%)	⬆️
...pache/dubbo/registry/support/AbstractRegistry.java	79.92% <0.00%> (+0.36%)	⬆️
...rg/apache/dubbo/common/timer/HashedWheelTimer.java	80.06% <0.00%> (+0.68%)	⬆️
...pache/dubbo/remoting/transport/AbstractServer.java	62.85% <0.00%> (+1.42%)	⬆️
...vent/listener/ServiceInstancesChangedListener.java	82.12% <0.00%> (+1.44%)	⬆️
... and 5 more

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