Performance tuning for TimeoutTask in DefaultFuture

[chickenlj]

What is the purpose of the change

manually merge #4085 and #4087

Brief changelog

XXXXX

Verifying this change

XXXXX

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[carryxyh]

Otherwise, LGTM.

[codecov-io]

Codecov Report

Merging #4129 into master will decrease coverage by 0.02%.
The diff coverage is 91.66%.

@@             Coverage Diff              @@
##             master    #4129      +/-   ##
============================================
- Coverage     62.75%   62.73%   -0.03%     
  Complexity      475      475              
============================================
  Files           766      766              
  Lines         32887    32888       +1     
  Branches       5189     5189              
============================================
- Hits          20637    20631       -6     
- Misses         9860     9865       +5     
- Partials       2390     2392       +2

Impacted Files	Coverage Δ	Complexity Δ
...dubbo/remoting/exchange/support/DefaultFuture.java	85.41% <91.66%> (+0.15%)	0 <0> (ø)	⬇️
.../dubbo/remoting/transport/netty4/NettyChannel.java	61.17% <0%> (-4.71%)	0% <0%> (ø)
.../apache/dubbo/remoting/transport/AbstractPeer.java	58.69% <0%> (-4.35%)	0% <0%> (ø)
...pache/dubbo/registry/support/AbstractRegistry.java	80.07% <0%> (-1.54%)	0% <0%> (ø)
...rg/apache/dubbo/common/timer/HashedWheelTimer.java	63.79% <0%> (-0.69%)	0% <0%> (ø)
.../java/org/apache/dubbo/config/ReferenceConfig.java	59.7% <0%> (+0.36%)	0% <0%> (ø)	⬇️
...bo/rpc/cluster/support/FailbackClusterInvoker.java	70.49% <0%> (+3.27%)	0% <0%> (ø)	⬇️
...c/main/java/org/apache/dubbo/rpc/RpcException.java	86.2% <0%> (+3.44%)	0% <0%> (ø)	⬇️
...ng/exchange/support/header/HeartbeatTimerTask.java	78.94% <0%> (+5.26%)	0% <0%> (ø)	⬇️

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