[fix] Run messageReadStats metrics registerFailedEvent execute on netty threa…

[zhouxy0809]

Fix: follow to #2006

Motivation

the metric of messageReadStats.registerFailedEvent() not execute in netty thread executor, and not consistent with context code

Modifications

*execute messageReadStats.registerFailedEvent() in netty.EventExecutor *

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[codecov]

Codecov Report

Merging #2007 (1a808ad) into master (014340d) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #2007      +/-   ##
============================================
+ Coverage     16.95%   16.96%   +0.01%     
- Complexity      728      729       +1     
============================================
  Files           191      191              
  Lines         14307    14309       +2     
  Branches       1339     1339              
============================================
+ Hits           2426     2428       +2     
- Misses        11703    11704       +1     
+ Partials        178      177       -1     

Files Changed	Coverage Δ
...tive/pulsar/handlers/kop/storage/PartitionLog.java	8.13% <0.00%> (-0.03%)	⬇️

... and 1 file with indirect coverage changes