[FT] Fail faster when passing unsupported metrics to InferenceEndpointModel

## Issue encountered
When passing an unsupported metric (e.g. single-token metric) to `InferenceEndpointModel`, an error is raised from `Pipeline.evaluate`:
```
ValueError: Endpoint models can't use single token metrics. Change the metric to the standard version
```
This happens once the endpoint has been created and the model has been created and loaded.

I wonder if the error could be raised earlier for optimization reasons: the process fails faster and resources are not wasted.

## Solution/Feature
Raise the error before the endpoint has been created.

## Possible alternatives
Leave it as it is.