add model to __all__

[jduerholt]

Motivation

RobustRelevancePursuitSingleTaskGP is not listed in __all__ in bofire/models/__init__.py. This PR adds it.

Have you read the Contributing Guidelines on pull requests?

Yes.

Test Plan

Not needed.

[jduerholt]

Hmm, one gets circular imports when one adds it, I assume this was the reason for not adding it in the first place ..., so I think, I should close this PR again, or what do you think?

[Balandat]

Hmm, interesting. I though this would be fixable by changing the from botorch.models import SingleTaskGP in https://github.com/pytorch/botorch/blob/main/botorch/models/robust_relevance_pursuit_model.py#L40 to from botorch.models.gp_regression import SingleTaskGP but that in itself will cause a circular import.

@SebastianAment since you wrote this code, do you have a better sense of what the issue here is?

[jduerholt]

It is also not important at all. We just encountered that the RobustRelevancePursuitSingleTaskGP has to be imported in a different way than the other models and I thought it should be easily fixable so I fired up this PR without even running the tests locally ..., but this has no priority for us at all, we import now directly from the source file ...

[Balandat]

Yeah - though the fact that things break even if you don't do this but instead adjust the import as in #2854 (comment) is disconcerting - we should understand what causes this and fix it.

[SebastianAment]

It is also not important at all. We just encountered that the RobustRelevancePursuitSingleTaskGP has to be imported in a different way than the other models and I thought it should be easily fixable so I fired up this PR without even running the tests locally ..., but this has no priority for us at all, we import now directly from the source file ...

I suspect this is because I added the relevance pursuit model to the multiple dispatch of fit_gpytorch_mll. That file likely introduces the import issue, but haven't checked, currently on vacation.

[Balandat]

Hmm yeah that would make sense. Let's take a look and see if that's the case when you're back; we may want to think about separating out the registries in a way that would avoid these circular import issues.