Onboarding v3 e2e tests

[jules-grenier-ledger]

🦒 Context (issues, jira)

LIVE-2077

💻 Description / Demo (image or video)

🖤 Expectations to reach

PR must pass CI, rebase develop if conflicts. Thanks!

• on QA: at least one of these two checkboxes must be checked:
  • [ ] a specific test planned is defined on Jira
  • [ ] this PR is covered by automatic UI test
• on delivery: at least one of these two checkboxes must be checked:
  • [ ] Option 1: no impact: The changes of this PR have ZERO impact on the userland (invisible for users)
  • [ ] Option 2: atomic delivery: the changes is atomic and complete (no partial delivery)