fix: install Az CLI in the ARM64 1ES pool (#1197)

Author: michaelawyu

.github/workflows/build-publish-mcr.yml

@@ -115,6 +115,9 @@ jobs:
       - uses: actions/checkout@v5
         with:
           ref: ${{ needs.prepare-variables.outputs.release_tag }}
+      - name: 'Install the Azure CLI'
+        run:
+          curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash
       - name: 'Login the ACR'
         run: |
           az login --identity