Automatic merge from submit-queue
CollisionCount should have type int32 across controllers that use it for collision avoidance
**What this PR does / why we need it**:
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#50530
**Special notes for your reviewer**:
/cc @liyinan926
/assign @kow3ns @thockin @janetkuo
**Release note**:
```release-note
Change CollisionCount from int64 to int32 across controllers
```
e553d6eb5b