ci: Change Flask E2E test artifact name (#23035)

## **Description**

This fixes an issue where the flask e2e artifact name was the same as
the regular smoke tests on android and preventing the second one to
upload.

## **Changelog**

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## **Related issues**

Fixes:

## **Manual testing steps**

```gherkin
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]
```

## **Screenshots/Recordings**

<!-- If applicable, add screenshots and/or recordings to visualize the
before and after of your change. -->

### **Before**

<!-- [screenshots/recordings] -->

### **After**

<!-- [screenshots/recordings] -->

## **Pre-merge author checklist**

- [ ] I’ve followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [ ] 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](https://jsdoc.app/) format
if applicable
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guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
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.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Renames the uploaded artifact in
`.github/workflows/run-e2e-smoke-tests-android-flask.yml` to
`e2e-smoke-android-flask-all-test-artifacts`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
f5db6b5. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: GuillaumeRx

.github/workflows/run-e2e-smoke-tests-android-flask.yml

@@ -65,5 +65,5 @@ jobs:
       - name: Upload all test artifacts (XMLs + Screenshots)
         uses: actions/upload-artifact@v4
         with:
-          name: e2e-smoke-android-all-test-artifacts
+          name: e2e-smoke-android-flask-all-test-artifacts
           path: all-test-artifacts/