Fix Wrong Deprecation Warning message for type/plot parameter

[freddyaboulton]

Description

While testing #4705 , I noticed that the Video component will emit a deprecation warning telling the user to use the Number component instead which makes no sense:

going back to https://github.com/gradio-app/gradio/pull/1090/files, this warning should only be emitted if type is used for the Textbox component. However, the Textbox component already checks if a faulty type arg is passed in so I think we can just get rid of that warning string.

Similarly the plot parameter originally applied to Image so we should only emit it for the image component.

Added a GradioUnusedKwargWarning class as well since an unused kwarg is not a deprecation warning

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[gradio-pr-bot]

All the demos for this PR have been deployed at https://huggingface.co/spaces/gradio-pr-deploys/pr-4709-all-demos

[pngwn]

Can confirm i am no longer seeing this warning (which was very confusing, i agree)! Thanks @freddyaboulton!

[freddyaboulton]

Thank you @pngwn ! Will merge once CI passes!