Remove unnecessary copy of bytes. resolve #1085

[kezhenxu94]

Ⅰ. Describe what this PR did

Remove unnecessary copy of bytes.

Ⅱ. Does this pull request fix one issue?

resolve #1085

[codecov-io]

Codecov Report

Merging #1087 into develop will increase coverage by 0.15%.
The diff coverage is 0%.

@@              Coverage Diff              @@
##             develop    #1087      +/-   ##
=============================================
+ Coverage      41.71%   41.87%   +0.15%     
  Complexity      1361     1361              
=============================================
  Files            243      243              
  Lines          10113    10106       -7     
  Branches        1319     1319              
=============================================
+ Hits            4219     4232      +13     
+ Misses          5348     5327      -21     
- Partials         546      547       +1

Impacted Files	Coverage Δ	Complexity Δ
...a/io/seata/core/rpc/netty/MessageCodecHandler.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...server/store/file/FileTransactionStoreManager.java	45.99% <0%> (+4.52%)	19% <0%> (ø)	⬇️

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[leizhiyuan]

LGTM

[slievrly]

LGTM