CI: add run-examples job to CI workflow

This makes examples run in the CI workflow, ensuring that they are
tested and functional.

Author: wprzytula

.github/workflows/build-lint-and-test.yml

@@ -243,3 +243,19 @@ jobs:
         with:
           name: ccm-log-cassandra-${{ matrix.java-version }}-${{ matrix.cassandra-version }}
           path: ${{ env.CCM_LOGS_PATTERN }}
+
+  run-examples:
+    name: Run examples
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Update apt cache
+        run: sudo apt-get update -y
+
+      - name: Install dependencies
+        run: make install-build-dependencies
+
+      - name: Run unit and proxy tests
+        run: make run-examples