feat: 1.6 new UI for onboarding success

[ieow]

Description

1.6
Update New SRP onboarding flow as per figma design
https://www.figma.com/design/pViOUcmjwhEzFsdrwknpNc/Onboarding-redesign?node-id=434-55200&t=wmEoQSF9g9lFtkwp-0

This PR is part 6 of 9 for the new SRP ui update

This PR cover

• new UI for onboarding Success

Related issues

Fixes:

Manual testing steps

1. Go to this page...

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

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