Fix issue with SAM2 producing segmentation masks as points and lines

[PawelPeczek-Roboflow]

Description

We had a problem with SAM2 model - sometimes it produces segmentation masks being points or lines. That do not come in line with sv.Detections(...) which skip the mask if it contains less than 3 points instead leaving blank. That was colliding with the code that associate detections id (more detections were visible - vs trimmed list in sv.Detections). Added filtering of malformed segmentations early-on

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How has this change been tested, please provide a testcase or example of how you tested the change?

• E2E test

Any specific deployment considerations

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Docs

• Docs updated? What were the changes: