OSF: Used model.NewPointer everywhere (#27838)

```release-note
NONE
```

server/channels/app/integration_action_test.go

@@ -163,7 +163,7 @@ func TestPostActionEmptyResponse(t *testing.T) {
 		require.True(t, ok)
 
 		th.App.UpdateConfig(func(cfg *model.Config) {
-			cfg.ServiceSettings.OutgoingIntegrationRequestsTimeout = model.NewInt64(1)
+			cfg.ServiceSettings.OutgoingIntegrationRequestsTimeout = model.NewPointer(int64(1))
 		})
 
 		_, err = th.App.DoPostActionWithCookie(th.Context, post.Id, attachments[0].Actions[0].Id, th.BasicUser.Id, "", nil)