backport: Export issue for Processes Administrators

[AyakorK]

🎩 Description

Please describe your pull request.
This PR fixes the issue of not receiving infos from the author of a proposal when exporting as a user who's an administrator from a processes and not an administrator from the platform.

📌 Related Issues

Link your PR to an issue

• Toulouse & decidim-app - Non extraction des mails dans les exports de propositions pour les admins d’espace
• fix: Export issue for Processes Administrators #231

Testing

Describe the best way to test or validate your PR.

Example:

• Sign in as an admin

• Go to a proposal component with published proposals

• Click on the export button

• See that you can view email and names of the participants

• Invite yourself as an admin of the PP or the assembly (with a different email address)

• Sign in as the space admin and go to the same proposal component

• Click on the export button

• See that you can view email and names of the participants just like the administrator of the platform

Tasks

• Add specs
• Fix little issue from Module Phone authorization handler in local that blocked the export of proposals
• Extend the export job to change the behavior for a process administrator

📷 Screenshots

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