fix: Survey's attachments

[AyakorK]

🎩 Description

Had multiple issues regarding survey's attachments related to user's answers

• Due to Sprockets issues we couldn't upload an attachment
• Retrieval of the attachments in the back-office was impossible due to the "absolute" link of the s3 bucket and not the relative link

Testing

• Log in as admin
• Access Backoffice
• Go to participatory processes
• Access a survey component
• Configure an "attachment answer"
• Answer the survey as a user
• Make sure you can upload correctly the attachment
• Access your survey component on the back office with admin
• Try to open the link of the answer's attachment
• Make sure the link matches /rails/active_storage/blobs/redirect/

📌 Related Issues

• Fixes [Bug] Cannot download the attached files from the survey responses #857

[Stef-Rousset]

I don't know if it is my config but I had a pb with the wicked_pdf_stylesheet_pack_tag:

• without running shakapacker-dev-server and submitting the survey with a file, I had this error =>

- when running shakapacker-dev-server and submitting the survey with a file, I had this error =>

[luciegrau]

Hi @AyakorK could you take a look at Stephanie's comment above please?