Fix the logic of finding the latest pull review commit ID (#32139) (#32165)

Backport #32139 by @Zettat123

Fix #31423

Co-authored-by: Zettat123 <zettat123@gmail.com>

routers/api/v1/repo/pull_review.go

@@ -83,7 +83,6 @@ func ListPullReviews(ctx *context.APIContext) {
 
 	opts := issues_model.FindReviewOptions{
 		ListOptions: utils.GetListOptions(ctx),
-		Type:        issues_model.ReviewTypeUnknown,
 		IssueID:     pr.IssueID,
 	}