Changes at "Add file uploads field to Debates component"

Is your feature request related to a problem? Please describe.
The debates component does not allow uploading files like you can do with proposals.

Describe the solution you'd like
Like on the proposal page, I would enable the upload of files attachments

Describe alternatives you've considered
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Additional context
Already planned https://github.com/decidim/decidim/issues/13479

Does this issue could impact on users private data?
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Funded by
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