fix: 将拉取请求和相关议题放在同一个并发组

[he0119]

并且是拉取请求相关操作时，会取消之前正在运行的操作。

比如，当评论之后马上关闭拉取请求，这个时候评论触发的操作还在进行，拉取请求的操作又被触发时，之前评论的操作会因为是同一个并发组被取消。

如果此时拉取请求的操作还在排队，这时候分支还存在，因为之前将拉取请求和分支绑定，也不会新建拉取请求。待拉取请求触发的操作运行后，会自动删除相关分支。

fixed #345

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.60%. Comparing base (31f3f0c) to head (8090257).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #347   +/-   ##
=======================================
  Coverage   93.60%   93.60%           
=======================================
  Files          41       41           
  Lines        2268     2268           
=======================================
  Hits         2123     2123           
  Misses        145      145           

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