Refactor ContentUploadModal.jsx from class based to functional component

[antedotee]

Ref: #4460

About This PR

This PR refactored

packages/volto/src/components/manage/Contents/ContentsUploadModal.jsx

from class based to functional component.

Before:

https://github.com/user-attachments/assets/eabaddbb-629d-43f0-9107-776840fab8f8

After:

https://github.com/user-attachments/assets/7088d68a-bc22-41bc-97e7-f54e1828411c

[mister-roboto]

@antedotee you need to sign the Plone Contributor Agreement to merge this pull request.

Learn about the Plone Contributor Agreement: https://plone.org/foundation/contributors-agreement

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[mister-roboto]

@antedotee you need to sign the Plone Contributor Agreement to merge this pull request.

Learn about the Plone Contributor Agreement: https://plone.org/foundation/contributors-agreement

[mister-roboto]

@antedotee you need to sign the Plone Contributor Agreement to merge this pull request.

Learn about the Plone Contributor Agreement: https://plone.org/foundation/contributors-agreement

[antedotee]

I have signed the contributor agreement still I am getting the error. Any suggestion?

[stevepiercy]

@antedotee from https://plone.org/foundation/contributors-agreement

I signed the Agreement, but haven't been given access yet?

Please allow a week for a response. Volunteers process the Contributor Agreements. If you have issues, such as making a spelling error in your email or GitHub username, please contact agreements@plone.org.

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[stevepiercy]

This PR may duplicate work in https://github.com/plone/volto/pull/6178.

Closing because the contributor has not followed up.