Add SAM export variants w/ input boxes

[xenova]

What does this PR do?

This PR adds 2 new variants for SAM: one with input_boxes (and no input_points) and one with both input_points and input_boxes.

Fixes # (issue)

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[HuggingFaceDocBuilderDev]

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[hylarucoder]

really need this!!

[github-actions]

This PR has been marked as stale because it has been open for 90 days with no activity. This thread will be automatically closed in 30 days if no further activity occurs.