Reduce memory allocation in ServiceDiscovery

[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.
• 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.
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[codecov-commenter]

Codecov Report

Merging #9328 (5421be8) into 3.0 (ef4cb63) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##                3.0    #9328   +/-   ##
=========================================
  Coverage     65.34%   65.34%           
- Complexity      341      343    +2     
=========================================
  Files          1201     1201           
  Lines         51837    51844    +7     
  Branches       7722     7723    +1     
=========================================
+ Hits          33874    33879    +5     
- Misses        14348    14353    +5     
+ Partials       3615     3612    -3     

Impacted Files	Coverage Δ
...n/java/org/apache/dubbo/metadata/MetadataInfo.java	62.10% <100.00%> (+0.17%)	⬆️
.../dubbo/registry/client/DefaultServiceInstance.java	89.34% <100.00%> (+3.75%)	⬆️
...vent/listener/ServiceInstancesChangedListener.java	80.08% <100.00%> (+0.16%)	⬆️
.../remoting/api/SingleProtocolConnectionManager.java	61.53% <0.00%> (-23.08%)	⬇️
...exchange/support/header/HeaderExchangeHandler.java	66.37% <0.00%> (-1.77%)	⬇️
...adata/store/zookeeper/ZookeeperMetadataReport.java	73.41% <0.00%> (-1.27%)	⬇️
...bo/registry/support/CacheableFailbackRegistry.java	77.10% <0.00%> (-1.21%)	⬇️
...ng/zookeeper/curator5/Curator5ZookeeperClient.java	63.28% <0.00%> (-0.97%)	⬇️
...ting/zookeeper/curator/CuratorZookeeperClient.java	67.78% <0.00%> (-0.97%)	⬇️
...dubbo/remoting/exchange/support/DefaultFuture.java	88.03% <0.00%> (-0.86%)	⬇️
... and 8 more

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