test: Enable Fixtures in E2E some tests tagged "Regression"

[SamuelSalas]

Description

Now that fixtures have been implemented in mobile, we should utilize them in our E2E tests. In this particular ticket, the goal is to enable fixtures in the following smoke tests:

• permission-system-delete-wallet.spec.js
• permission-system-revoke-single-account.spec.js
• add-custom-rpc.spec.js

Recording

Bitrise run https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/727339f4-5024-403c-82a1-49a0e171b4d5

Related issues

Fixes #???

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've clearly explained:
  • What problem this PR is solving.
  • How this problem was solved.
  • How reviewers can test my changes.
• I’ve indicated what issue this PR is linked to: Fixes #???
• I’ve included tests if applicable.
• I’ve documented any added code.
• I’ve applied the right labels on the PR (see labeling guidelines).
• I’ve properly set the pull request status:
  • In case it's not yet "ready for review", I've set it to "draft".
  • In case it's "ready for review", I've changed it from "draft" to "non-draft".

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.

[codecov-commenter]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (24b4b7e) 34.61% compared to head (5f34f4a) 34.61%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7402   +/-   ##
=======================================
  Coverage   34.61%   34.61%           
=======================================
  Files        1017     1017           
  Lines       27162    27162           
  Branches     2211     2211           
=======================================
  Hits         9402     9402           
  Misses      17273    17273           
  Partials      487      487           

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[cortisiko]

✅ ✅ ✅

[Andepande]

LGTM