Adding more logs in netty requests

[justinlin-linkedin]

Summary

Add more logs to NettyRequest to show more errors when client closing the connections.

Testing Done

Just the log

[codecov-commenter]

Codecov Report

❌ Patch coverage is 86.95652% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.81%. Comparing base (52ba813) to head (09cde72).
⚠️ Report is 341 commits behind head on master.

Files with missing lines	Patch %	Lines
...a/com/github/ambry/rest/NettyMessageProcessor.java	57.14%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3196      +/-   ##
============================================
+ Coverage     64.24%   69.81%   +5.56%     
- Complexity    10398    12816    +2418     
============================================
  Files           840      930      +90     
  Lines         71755    79080    +7325     
  Branches       8611     9461     +850     
============================================
+ Hits          46099    55206    +9107     
+ Misses        23004    20933    -2071     
- Partials       2652     2941     +289     

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