[BUG] Clip annotation requests upload the incorrect frame

[tawsifsr]

Describe the problem

When submitting an annotation request from a clip view. The frames uploaded to cvat are off by 1 frame. This may be due to cvat using 0 based index and fiftyone frames being 1 based.

Code to reproduce issue

1. Load any video dataset with annotations
2. Switch to clip view
3. Select a few clips for annotation
4. Submit to cvat

System information

• Ubuntu 20.04
• Python 3.8.18
• FiftyOne 0.25.1

Willingness to contribute

The FiftyOne Community encourages bug fix contributions. Would you or another
member of your organization be willing to contribute a fix for this bug to the
FiftyOne codebase?

• Yes. I can contribute a fix for this bug independently
• Yes. I would be willing to contribute a fix for this bug with guidance
  from the FiftyOne community
• No. I cannot contribute a bug fix at this time