chore(ci): add workflow to automate bumping aztec-packages commit (#7465

)

.github/workflows/bump-aztec-packages-commit.yml

@@ -0,0 +1,50 @@
+name: Bump external repos pinned commits
+
+on:
+  workflow_dispatch:
+  schedule:
+    # Trigger at 8am on Mondays
+    - cron: '0 8 * * 1'
+
+
+jobs:
+  bump-commit:
+    name: Update external repo pinned commits
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+        with:
+          ref: master
+
+      - name: Check for existing PR
+        id: pr-check
+        run: |
+          set -xue # print commands         
+          PR_URL=$(gh pr list --repo noir-lang/noir --head bump-aztec-packages --json url --jq ".[0].url")
+          echo "pr_url=$PR_URL" >> $GITHUB_OUTPUT
+        env:
+          GH_TOKEN: ${{ github.token }}
+
+      - name: Configure git
+        run: |
+          git config user.name noirwhal
+          git config user.email [email protected]    
+        
+      - name: Update commit
+        run: |
+          git checkout bump-aztec-packages || git checkout -b bump-aztec-packages
+          ./scripts/bump-aztec-packages-commit.sh
+          git add .
+          git commit -m 'chore: Update pinned commit of aztec-packages'
+          git push --set-upstream origin bump-aztec-packages --force
+
+      - name: Create PR
+        if: ${{ steps.pr-check.outputs.pr_url == '' }}
+        run: |
+          PR_BODY="""
+          Automated update of the pinned commit of [aztec-packages](https://github.com/AztecProtocol/aztec-packages) repository against which we run benchmarks.
+          """
+          gh pr create --repo noir-lang/noir --title "chore: bump external pinned commits" --body "$PR_BODY" --base master --head bump-aztec-packages
+        env:
+          GH_TOKEN: ${{ secrets.NOIR_REPO_TOKEN }}