fix: Replace all mentions of cdn.jsdelivr.net by our self-hosted cdn

[AyakorK]

🎩 Description

Please describe your pull request.
This PR fixes multiple issues reported by Toulouse related to the GDPR

📌 Related Issues

Link your PR to an issue

• Notion card

Testing

Describe the best way to test or validate your PR.

Example:

• Access to the local platform
• Open the network (right click + inspect + check on the right until you find "Network")
• Switch to French Language
• Filter using the search bar for "fr-FR"
• Refresh the page with the network open
• Make sure you see the fr-FR.lang and than when you click on it you see this url https://decidim.storage.opensourcepolitics.eu/osp-cdn/form_builder/1.1.0 linked to the file

Tasks

• Override multiple files mentioning the previous CDN

📷 Screenshots

Please add screenshots of the changes you're proposing if related to the UI