Implementation of a "Segment Anything" SAM Estimator

[kieranfraser]

Is your feature request related to a problem? Please describe.
The "Segment Anything" (SAM) foundation model has received a lot of attention since its release a month ago (already 30k+ stars on GitHub) and some initial attacks have just been performed on the model: https://arxiv.org/pdf/2305.00866.pdf
Adding SAM to ART would facilitate further evaluation of the model under attack - and also encourage evaluation of existing/new defenses for image segmentation.

Describe the solution you'd like
An estimator for SAM.

Describe alternatives you've considered
N/A

Additional context
N/A