Add a demo module for database write prohibition plugin integration t…

[hanbingleixue]

【修复issue】#1461

【修改内容】增加数据库禁写插件的集成测试demo

【用例描述】1、无功能修改，不需要增加用例

【自测情况】1、本地静态检查通过

【影响范围】1、对用户的使用没有影响

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.06%. Comparing base (481ae23) to head (71fcea7).
Report is 10 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #1462      +/-   ##
=============================================
+ Coverage      43.95%   44.06%   +0.10%     
- Complexity      4668     4712      +44     
=============================================
  Files           1213     1231      +18     
  Lines          26133    26382     +249     
  Branches        2745     2755      +10     
=============================================
+ Hits           11486    11624     +138     
- Misses         13265    13370     +105     
- Partials        1382     1388       +6     

Flag	Coverage Δ
unittests	44.06% <ø> (+0.10%)	⬆️

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