Add test coverage of x86-64 Python from `setup-python` on arm64 macOS (#15687)

.github/workflows/ci.yml

@@ -2305,8 +2305,6 @@ jobs:
       - name: "Prepare binary"
         run: chmod +x ./uv
 
-      # This should be the macOS system Python
-      # We'd like to test with Homebrew but this Python takes precedence in system Python discovery
       - name: "Print Python path"
         run: echo $(which python3)
 
@@ -2340,6 +2338,35 @@ jobs:
       - name: "Validate global Python install"
         run: python3 scripts/check_system_python.py --uv ./uv --externally-managed
 
+  system-test-macos-aarch64-emulated:
+    timeout-minutes: 10
+    needs: build-binary-macos-aarch64
+    name: "check system | x86-64 python on macos aarch64"
+    runs-on: macos-14 # github-macos-14-aarch64-3
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+
+      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+        with:
+          python-version: 3.13
+          architecture: x64
+
+      - name: "Download binary"
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+        with:
+          name: uv-macos-aarch64-${{ github.sha }}
+
+      - name: "Prepare binary"
+        run: chmod +x ./uv
+
+      - name: "Print Python path"
+        run: echo $(which python3)
+
+      - name: "Validate global Python install"
+        run: python3 scripts/check_system_python.py --uv ./uv --externally-managed
+
   system-test-macos-x86_64:
     timeout-minutes: 10
     needs: build-binary-macos-x86_64