Tcp plugin

[ywj1352]

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #4607 (d09f20f) into master (a6c7831) will decrease coverage by 0.06%.
The diff coverage is 3.57%.

@@             Coverage Diff              @@
##             master    #4607      +/-   ##
============================================
- Coverage     67.72%   67.66%   -0.06%     
  Complexity     7833     7833              
============================================
  Files          1065     1067       +2     
  Lines         30578    30606      +28     
  Branches       2785     2785              
============================================
+ Hits          20708    20709       +1     
- Misses         8249     8276      +27     
  Partials       1621     1621              

Impacted Files	Coverage Δ
...rg/apache/shenyu/common/dto/ProxySelectorData.java	0.00% <0.00%> (ø)
...common/dto/convert/selector/DiscoveryUpstream.java	0.00% <0.00%> (ø)
...ava/org/apache/shenyu/common/enums/PluginEnum.java	100.00% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more