ci(bigquery): run some bigquery unit tests against PRs (#8827)

.github/workflows/ibis-backends.yml

@@ -42,6 +42,50 @@ env:
   HYPOTHESIS_PROFILE: "ci"
 
 jobs:
+  test_bigquery_lite:
+    name: BigQuery ${{ matrix.os }} python-${{ matrix.python-version }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+        python-version:
+          - "3.9"
+          - "3.11"
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+
+      - name: install poetry
+        run: pipx install 'poetry==1.8.2'
+
+      - name: install python
+        uses: actions/setup-python@v5
+        id: install_python
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: poetry
+
+      - name: install ibis
+        run: poetry install --without dev --without docs --extras bigquery
+
+      - uses: extractions/setup-just@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: run simple bigquery unit tests
+        run: just ci-check ibis/backends/bigquery/tests/unit
+
+      - name: upload code coverage
+        if: success()
+        continue-on-error: true
+        uses: codecov/codecov-action@v4
+        with:
+          flags: backend,bigquery,${{ runner.os }},python-${{ steps.install_python.outputs.python-version }}
+          token: ${{ secrets.CODECOV_TOKEN }}
+
   test_backends:
     name: ${{ matrix.backend.title }} ${{ matrix.os }} python-${{ matrix.python-version }}
     runs-on: ${{ matrix.os }}