French responses have English branding

## Description

When submitting a form, the responses are in the language of the interface on submission: EN-only or FR-only. At the same time, the branding is static in English only even when submitted in French.

## Steps to reproduce on **email delivery**
1. Set response delivery to email for a draft form
2. Submit a test response
3. Check the bottom of the response email

## Steps to reproduce on **download**
1. Set response delivery to download from GC Forms
2. Submit a few test responses
3. Go to responses
4. Select all new responses
5. Download as CSV
6. Check the receipt file

## Details
- **Browser**: Chrome / Edge
- **Operating system**: MacOS / Windows
- **Environment**: App router PR
- **Language**: French
- **Viewport**: Desktop / tablet

## Expected behaviour
We might want to consider flipping the logo for the French responses to have "Gouvernement du Canada" in French first.

English form submit --> English response --> English branding
French form submit --> French response --> French branding

## Additional context

Since we're using the Notify template to send the email with the GC brand, Notify doesn't allow switching the header for the same "service." Therefore, the solution would be to create a new Notify service and a set of templates to incorporate the new French branding logo.

https://gcdigital.slack.com/archives/C03FA4DJCCU/p1711392858214069

https://www.canada.ca/en/treasury-board-secretariat/services/government-communications/federal-identity-program/manual.html

## Screenshots or videos