Ensure `experimental_render_inferences` accepts outputs from both `list_inferences` and `list_datapoints`

[GabrielBianconi]

[virajmehta]

We will instead make a method experimental_render_samples that returns a generic RenderedSample type that the launch inference method will take. This will be generic so that you could pass in either a Vec or a Vec and the RenderedSample type will drop information that's not present in either function.