test: increase Confirmations e2e stability by terminating ganache on hooks

[seaona]

Description

It has been observed that in some Android runs, relative to confirmations, tests were sometimes flaky due to Ganache not terminating properly.
This was not evident on regular runs as only Smoke tests are run (with 1 test using ganache) but it shines in the case you run all the Confirmations e2e (more than 1 test using ganache, needing the server to terminate and start everytime).
(Context)
This change increase confirmations e2e stability by terminating the ganache server in the afterEach hooks instead of inside the withFixtures method.

Manual testing steps

• Run the tests locally
• Run the tests on Bitrise. Test run here: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/12c59c1c-7265-4c9e-aa79-e9af0c867d92

Screenshots/Recordings

Before

Intermittent Android failures

After

All runs are passing now in Android

Related issues

• Fixes https://github.com/MetaMask/mobile-planning/issues/1277

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.

[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.

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (ad9793b) 34.43% compared to head (a274ebe) 34.43%.
Report is 1 commits behind head on main.

Additional details and impacted files

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  Hits         9329     9329           
  Misses      17267    17267           
  Partials      493      493           

see 3 files with indirect coverage changes

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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