Migration failure during reaction migration from gitea (#13344)

* Migrating reactions is just not that important

A failure during migrating reactions should not cause failure of
migration.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* When checking issue reactions check the correct permission

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

routers/api/v1/repo/issue_reaction.go

@@ -271,7 +271,7 @@ func GetIssueReactions(ctx *context.APIContext) {
 		return
 	}
 
-	if !ctx.Repo.CanRead(models.UnitTypeIssues) {
+	if !ctx.Repo.CanReadIssuesOrPulls(issue.IsPull) {
 		ctx.Error(http.StatusForbidden, "GetIssueReactions", errors.New("no permission to get reactions"))
 		return
 	}