Optimize proxy interface and method

[drpmma]

What is the purpose of the change

Optimize proxy interface and method

Brief changelog

• Add popMessage AddressableMessageQueue interface

• Change ClusterMessageService field to protected

• Add notification in MQClientAPIExt

[lollipopjin]

LGTM

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 8.69565% with 21 lines in your changes missing coverage. Please review.

Project coverage is 42.43%. Comparing base (d3de48c) to head (5e12d3b).
Report is 992 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ocketmq/proxy/service/mqclient/MQClientAPIExt.java	0.00%	18 Missing ⚠️
...he/rocketmq/proxy/processor/ConsumerProcessor.java	40.00%	3 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #5628      +/-   ##
=============================================
- Coverage      42.46%   42.43%   -0.04%     
- Complexity      7971     7972       +1     
=============================================
  Files           1023     1023              
  Lines          71449    71477      +28     
  Branches        9439     9444       +5     
=============================================
- Hits           30340    30330      -10     
- Misses         37276    37308      +32     
- Partials        3833     3839       +6     

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