Remove error returns from crypto random helpers and callers (#37240)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: wxiaoguang <2114189+wxiaoguang@users.noreply.github.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <115237+silverwind@users.noreply.github.com>

routers/api/actions/runner/runner.go

@@ -80,9 +80,7 @@ func (s *Service) Register(
 		AgentLabels: labels,
 		Ephemeral:   req.Msg.Ephemeral,
 	}
-	if err := runner.GenerateToken(); err != nil {
-		return nil, errors.New("can't generate token")
-	}
+	runner.GenerateAndFillToken()
 
 	// create new runner
 	if err := actions_model.CreateRunner(ctx, runner); err != nil {