[#9932] Replace with Netty4

[emeroad]

No description provided.

[codecov]

Codecov Report

Merging #10007 (ae498be) into master (8e3ad78) will increase coverage by 0.01%.
The diff coverage is 66.01%.

@@             Coverage Diff              @@
##             master   #10007      +/-   ##
============================================
+ Coverage     38.58%   38.59%   +0.01%     
- Complexity    11613    11626      +13     
============================================
  Files          3571     3573       +2     
  Lines         93275    93340      +65     
  Branches      10310    10320      +10     
============================================
+ Hits          35986    36022      +36     
- Misses        54209    54232      +23     
- Partials       3080     3086       +6     

Impacted Files	Coverage Δ
.../navercorp/pinpoint/io/DefaultResponseMessage.java	0.00% <0.00%> (ø)
...ercorp/pinpoint/collector/util/RequestManager.java	51.92% <51.92%> (ø)
.../navercorp/pinpoint/rpc/client/RequestManager.java	63.07% <66.66%> (-1.63%)	⬇️
...orp/pinpoint/rpc/server/DefaultPinpointServer.java	79.59% <75.00%> (-0.25%)	⬇️
...nt/collector/receiver/grpc/PinpointGrpcServer.java	48.58% <88.88%> (+1.18%)	⬆️
...eiver/grpc/service/command/GrpcCommandService.java	52.12% <100.00%> (+0.58%)	⬆️
...p/pinpoint/collector/util/RequestFailListener.java	100.00% <100.00%> (ø)
...point/rpc/client/DefaultPinpointClientHandler.java	72.43% <100.00%> (+0.09%)	⬆️
.../navercorp/pinpoint/rpc/packet/ResponsePacket.java	46.42% <100.00%> (-1.85%)	⬇️

... and 4 files with indirect coverage changes