refactor: update bitrise e2e check to not run on forks (#10128)

## **Description**

This pull request updates the bitrise e2e check workflow to only trigger
from branches within the MetaMask Mobile repository. This brings it in
line with other patterns we see across MetaMask such as in
[core](https://github.com/MetaMask/core/blob/4fe6141a24aa11bb6672ea31a6e33efe041ffcc1/.github/workflows/publish-preview.yml#L13).


## **Manual testing steps**

**Pull request on repository (non-fork)**
1. Look at CI on this pull request
2. See the successful run of `Run Bitrise E2E Check`.

**Pull Request From Fork**
1.  Visit https://github.com/NicholasEllul/metamask-mobile/pull/3
2. See in the CI output that the `run-bitrise-e2e-check` was
[skipped](https://github.com/NicholasEllul/metamask-mobile/actions/runs/9686283967/job/26728373509?pr=3).

## **Screenshots/Recordings**


### **Before**


### **After**


## **Pre-merge author checklist**

- [X] 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).
- [X] I've completed the PR template to the best of my ability
- [X] I’ve included tests if applicable
- [X] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [X] I’ve applied the right labels on the PR (see [labeling
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.

.github/workflows/run-bitrise-e2e-check.yml

@@ -12,9 +12,24 @@ env:
   WORKFLOW_NAME: 'run-bitrise-e2e-check'
 
 jobs:
+  is-fork-pull-request:
+    name: Determine pull request source
+    if: ${{ github.event.issue.pull_request || github.event_name == 'pull_request' }}
+    runs-on: ubuntu-latest
+    outputs:
+      IS_FORK: ${{ steps.is-fork.outputs.IS_FORK }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Determine whether this PR is from a fork
+        id: is-fork
+        run: echo "IS_FORK=$(gh pr view --json isCrossRepository --jq '.isCrossRepository' "${{ github.event.number }}" )" >> "$GITHUB_OUTPUT"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
   run-bitrise-e2e-check:
+    needs: is-fork-pull-request
     runs-on: ubuntu-latest
-    if: ${{ github.event.issue.pull_request || github.event_name == 'pull_request' }}
+    if: ${{ needs.is-fork-pull-request.outputs.IS_FORK == 'false' }}
     permissions:
       pull-requests: write
       contents: write