[Docs] Add docstrings about feed-forward chunking

[sayakpaul]

@patrickvonplaten added support for feed-forward chunking to optimize memory usage for video pipelines. PRs: #3930, #3934.

Even though enable_forward_chunking is included in the docstring, I believe we should also add a little section to the pipeline documentation pages that are affected by it.

[patrickvonplaten]

Feel free to open a PR for it @sayakpaul

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[sayakpaul]

@stevhliu WDYT about this?

[stevhliu]

I think that's a good idea! What do you also think about creating a more comprehensive image-to-video guide similar to the ones found in this section?

[sayakpaul]

I like the idea.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the contributing guidelines are likely to be ignored.