add requirement installation to tests

Author: laurasgkadri98

.github/workflows/ci_cd.yml

@@ -32,6 +32,19 @@ jobs:
        python-version: ['3.9', '3.12']
       fail-fast: false
     steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          
       - name: Testing (Linux)
         uses: ansys/actions/tests-pytest@v6
         timeout-minutes: 12