optimize: optimize client batch sending.

[objcoding]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

fixes #4156

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[slievrly]

• additional-spring-configuration-metadata.json
• change log

[slievrly]

[objcoding]

done.

[codecov-commenter]

Codecov Report

Merging #4157 (25b4c3b) into develop (ea89cec) will decrease coverage by 0.01%.
The diff coverage is 40.00%.

@@              Coverage Diff              @@
##             develop    #4157      +/-   ##
=============================================
- Coverage      49.77%   49.76%   -0.02%     
  Complexity      3768     3768              
=============================================
  Files            700      700              
  Lines          23608    23621      +13     
  Branches        2912     2913       +1     
=============================================
+ Hits           11751    11754       +3     
- Misses         10663    10671       +8     
- Partials        1194     1196       +2     

Impacted Files	Coverage Δ
...ava/io/seata/core/constants/ConfigurationKeys.java	0.00% <ø> (ø)
...ava/io/seata/core/rpc/netty/NettyClientConfig.java	43.75% <ø> (-1.57%)	⬇️
.../autoconfigure/properties/TransportProperties.java	45.45% <25.00%> (-6.55%)	⬇️
...ta/core/rpc/netty/AbstractNettyRemotingClient.java	18.44% <50.00%> (+0.48%)	⬆️
...io/seata/core/rpc/netty/RmNettyRemotingClient.java	39.49% <50.00%> (+0.36%)	⬆️
...io/seata/core/rpc/netty/TmNettyRemotingClient.java	56.32% <100.00%> (+0.50%)	⬆️
...o/seata/server/coordinator/DefaultCoordinator.java	48.92% <0.00%> (-0.54%)	⬇️
...in/java/io/seata/server/session/GlobalSession.java	79.56% <0.00%> (-0.44%)	⬇️

[funky-eyes]

LGTM