feat: Adding metrics events for re-designed signatures pages

[jpuri]

Description

Capture signature events in metrics in re-designed signature pages:

1. Signature requested
2. Signature approved
3. Signature rejected

Also capture ui_customizations with the value redesigned_confirmation for re-designed pages.

Related issues

Fixes: https://github.com/MetaMask/MetaMask-planning/issues/3856, https://github.com/MetaMask/MetaMask-planning/issues/3867

Manual testing steps

1. Enable re-designs and metrics locally
2. Submit signature request
3. Check metrics

Screenshots/Recordings

NA

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]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[github-actions]

Bitrise

❌❌❌ pr_smoke_e2e_pipeline failed on Bitrise! ❌❌❌

Commit hash: c334156
Build link: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/d613c9f0-9729-4ab7-b404-5cd3995239b6

Note

• You can kick off another pr_smoke_e2e_pipeline on Bitrise by removing and re-applying the Run Smoke E2E label on the pull request

Tip

• Check the documentation if you have any doubts on how to understand the failure on bitrise

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.1% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud