Don't share pipeline state in fields of the FileChunkedStrategy instance

[lhotari]

• replace shared state with check each time
• remove redundant check in NettyOutbound.sendFileChunked

[codecov-io]

Codecov Report

Merging #319 into master will increase coverage by 0.05%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##             master     #319      +/-   ##
============================================
+ Coverage     68.22%   68.28%   +0.05%     
- Complexity     1020     1022       +2     
============================================
  Files            73       73              
  Lines          4312     4310       -2     
  Branches        618      615       -3     
============================================
+ Hits           2942     2943       +1     
- Misses          997      998       +1     
+ Partials        373      369       -4

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/reactor/ipc/netty/NettyOutbound.java	84.74% <100%> (+2.77%)	27 <0> (ø)	⬇️
...etty/channel/data/AbstractFileChunkedStrategy.java	69.56% <60%> (+4.34%)	6 <4> (+2)	⬆️
.../ipc/netty/channel/PooledClientContextHandler.java	67.22% <0%> (-0.85%)	26% <0%> (-1%)
...or/ipc/netty/http/server/HttpServerOperations.java	71.05% <0%> (+0.52%)	56% <0%> (+1%)	⬆️

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[violetagg]

Thanks