Draft: Add an option "I'm not interested" for eAccount

Description

Some users complains about not having a "I'm not interested" option at the step where user can ask an invitation to create an account.

few proposal has been provided and this one seems to get the most interest

[...]
 think we have 2 options:
- add a third bullet point, to let user choose they don't want an /e/ account
- keep the 2 existing bullet point, and only play with the next button


Skip by default

Next if the user choose one of the 2 options

Issue(s)

closes #199

Test environment

• Download a build from latest pipeline of this MR

Test procedures

• Install the version corresponding to your running OS
• start to flash a device. You'll see the eAccount step before the last step of flashing.
• Select the new option and click on continue

Screenshots

Proposal 1

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation