Add `Qwen2VLImageProcessorFast` into `Qwen2VLProcessor`
Author: yeliudev
Pull request: yes

# What does this PR do?

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Add `Qwen2VLImageProcessorFast` into `Qwen2VLProcessor` so that users can set `use_fast` when initializing the processor.

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Comments:
@yonigozlan Thanks for the suggestion! Indeed this should be better.

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_35987). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.