smoke test sdist in PR CI

.github/workflows/tests.yml

@@ -151,3 +151,23 @@ jobs:
       run: cargo install cargo-audit
     - name: Run cargo audit
       run: cargo audit
+
+  smoke_test_sdist_build:
+    name: Smoke test source distribution build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install setuptools wheel setuptools-rust
+      - name: Build sdist
+        run: python -m build --sdist
+      - uses: actions/upload-artifact@v3
+        with:
+          path: dist/*.tar.gz
+          name: sdist