fix: remove the remainder gha-mmsdk self hosted nodes jobs

[makemesteaks]

Description

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CHANGELOG entry:

Related issues

Fixes:

Manual testing steps

Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]

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• 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
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Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
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---

Note

Switches Android BrowserStack build to CirrusLabs Ubuntu runner with system image install and deletes QA test Android/iOS build workflows.

• CI Workflows:
  • Android BrowserStack Build (.github/workflows/build-android-upload-to-browserstack.yml):
    • Change runner to ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-xl.
    • Add step to install Android 34 Google APIs x86_64 system image.
  • Removed QA Test Workflows:
    • Delete test-android-build-app.yml (Android QA build and artifact uploads).
    • Delete test-ios-build-app.yml (iOS QA build and artifact uploads).

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

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[github-actions]

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