ci: Replace local check merge queue action with github-tools version (#7538)

## Explanation

The `check-merge-queue` action was moved to `github-tools` so it can be
reused by other repositories.

## References

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## Checklist

- [ ] I've updated the test suite for new or updated code as appropriate
- [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [ ] I've communicated my changes to consumers by [updating changelogs
for packages I've
changed](https://github.com/MetaMask/core/tree/main/docs/contributing.md#updating-changelogs)
- [ ] I've introduced [breaking
changes](https://github.com/MetaMask/core/tree/main/docs/breaking-changes.md)
in this PR and have prepared draft pull requests for clients and
consumer packages to resolve them

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Switches the merge-queue check to the shared `MetaMask/github-tools`
action and deletes the local implementation.
> 
> - **CI**:
> - Replace local `check-merge-queue` composite action with
`MetaMask/github-tools/.github/actions/check-skip-merge-queue@v1` in
`.github/workflows/main.yml`.
> - Remove `.github/actions/check-merge-queue/action.yml` local action.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
ca46a57. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: Mrtenz

.github/actions/check-merge-queue/action.yml

@@ -23,11 +23,7 @@ jobs:
       - name: Check pull request merge queue status
         id: check-skip-merge-queue
         if: github.event_name == 'merge_group'
-        uses: ./.github/actions/check-merge-queue
-        with:
-          head-ref: ${{ github.event.merge_group.head_ref }}
-          base-ref: main
-          github-token: ${{ secrets.GITHUB_TOKEN }}
+        uses: MetaMask/github-tools/.github/actions/check-skip-merge-queue@v1
 
   check-workflows:
     name: Check workflows