fix(actions): skip already-approved runs in ApproveRuns (#38653)

The handler of `/actions/runs/{run}/approve` doesn't check if the run is
already approved. If a run is re-approved, its jobs' status will be
reset to `StatusWaiting`, causing incorrect job status.

services/actions/approve.go

@@ -28,6 +28,9 @@ func ApproveRuns(ctx context.Context, repo *repo_model.Repository, doer *user_mo
 			if err != nil {
 				return err
 			}
+			if !run.NeedApproval {
+				continue
+			}
 			run.NeedApproval = false
 			run.ApprovedBy = doer.ID
 			if err := actions_model.UpdateRun(ctx, run, "need_approval", "approved_by"); err != nil {