[#9298] Bump alibaba dubbo to 2.6.12

[emeroad]

No description provided.

[codecov]

Codecov Report

Merging #9314 (d7bdecd) into master (72038c7) will increase coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #9314   +/-   ##
=========================================
  Coverage     39.39%   39.39%           
- Complexity    11774    11775    +1     
=========================================
  Files          3407     3407           
  Lines         91261    91261           
  Branches      10118    10118           
=========================================
+ Hits          35948    35955    +7     
+ Misses        52214    52207    -7     
  Partials       3099     3099           

Impacted Files	Coverage Δ
...tor/metric/datasource/DefaultDataSourceMetric.java	85.18% <0.00%> (-3.71%)	⬇️
...om/navercorp/pinpoint/rpc/codec/PacketDecoder.java	51.66% <0.00%> (-1.67%)	⬇️
...ollector/cluster/zookeeper/ZookeeperJobWorker.java	79.67% <0.00%> (+1.60%)	⬆️
...rc/main/java/com/navercorp/pinpoint/test/Item.java	75.92% <0.00%> (+3.70%)	⬆️
...p/pinpoint/rpc/stream/StreamChannelRepository.java	78.94% <0.00%> (+21.05%)	⬆️

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