Allow video inference fps value to pass through to API

[capjamesg]

Description

This PR updates the video inference API wrappers in the roboflow package to adhere to the fps that the user passes.

Type of change

• New feature (non-breaking change which adds functionality)

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

This change can be tested using the following code:

from roboflow import Roboflow

rf = Roboflow(api_key="API_KEY")
project = rf.workspace().project("logistics-sz9jr")
model = project.version(2).model

job_id, signed_url = model.predict_video(
    "video.mp4",
    fps=1,
    prediction_type="batch-video",
)

results = model.poll_until_video_results(job_id)

print(results)

job_id, signed_url = model.predict_video(
    "video.mp4",
    fps=5,
    prediction_type="batch-video",
)

results = model.poll_until_video_results(job_id)

print(results)

And ensuring that the FPS intervals are 1 FPS for the first video and 5 fps for the second video.

Any specific deployment considerations

N/A

Docs

N/A

[bigbitbus]

lgtm