optimize: tm module code style

[EZKAYOTWJPRKXWCUYEEB]

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

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

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #2099 into develop will decrease coverage by <.01%.
The diff coverage is 66.66%.

@@              Coverage Diff              @@
##             develop    #2099      +/-   ##
=============================================
- Coverage      55.16%   55.15%   -0.01%     
+ Complexity      2515     2513       -2     
=============================================
  Files            446      446              
  Lines          14922    14915       -7     
  Branches        1768     1765       -3     
=============================================
- Hits            8232     8227       -5     
  Misses          5922     5922              
+ Partials         768      766       -2

Impacted Files	Coverage Δ	Complexity Δ
...ata/tm/api/transaction/TransactionHookManager.java	85.71% <ø> (+5.71%)	6 <0> (ø)	⬇️
...java/io/seata/tm/api/GlobalTransactionContext.java	100% <100%> (ø)	6 <2> (ø)	⬇️
...a/io/seata/tm/api/transaction/TransactionInfo.java	95.23% <100%> (ø)	12 <0> (-1)	⬇️
...ain/java/io/seata/tm/TransactionManagerHolder.java	84.61% <100%> (ø)	4 <0> (ø)	⬇️
...java/io/seata/tm/api/DefaultGlobalTransaction.java	73.33% <50%> (+2.36%)	19 <0> (ø)	⬇️
...ava/io/seata/tm/api/DefaultFailureHandlerImpl.java	75% <50%> (+2.27%)	6 <0> (ø)	⬇️
...java/io/seata/tm/api/transaction/RollbackRule.java	92.85% <0%> (-7.15%)	14% <0%> (-1%)
...very/registry/zk/ZookeeperRegisterServiceImpl.java	62.9% <0%> (-0.81%)	24% <0%> (ø)

[lightClouds917]

LGTM

[lightClouds917]

LGTM

[slievrly]

LGTM

[l81893521]

LGTM