Prototype new pattern for ESProducers and ESProducts in standalone

[makortel]

Done in cms-patatrack/pixeltrack-standalone#257

[makortel]

Something along the following

cms::cuda::ESProduct<Product> ESProducer::produce(FooRecord& rcd) {
  return cms::cuda::make_esproduct([](cms::cuda::ESContext& ctx) {
    ... = ctx.device();
    ... = ctx.stream();
    ... = cms::cuda::make_device_unique<Foo>(ctx);
    ... = cms::cuda::make_host_unique<Foo>(ctx);
    return Product(...);
  });
}