流量标签透传特性：支持httpclient4.x

[lilai23]

【修复issue】#1244

【修改内容】

1、新增流量标签透传插件
2、支持httpclient4.x客户端的流量标签透传

【用例描述】后续补充测试用例

【自测情况】1、本地静态检查通过；2、本地自测通过

【影响范围】无

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.06 ⚠️

Comparison is base (3fb63d0) 41.52% compared to head (8de452d) 41.46%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #1251      +/-   ##
=============================================
- Coverage      41.52%   41.46%   -0.06%     
  Complexity      3212     3212              
=============================================
  Files            817      820       +3     
  Lines          18032    18056      +24     
  Branches        1961     1963       +2     
=============================================
  Hits            7487     7487              
- Misses          9607     9631      +24     
  Partials         938      938              

Flag	Coverage Δ
unittests	41.46% <0.00%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...uaweicloud/sermant/core/utils/CollectionUtils.java	0.00% <0.00%> (ø)
...a/com/huaweicloud/sermant/core/utils/MapUtils.java	60.00% <0.00%> (-4.29%)	⬇️
...huaweicloud/sermant/core/utils/tag/TrafficTag.java	0.00% <0.00%> (ø)
...aweicloud/sermant/core/utils/tag/TrafficUtils.java	0.00% <0.00%> (ø)

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