Install graphviz in test pipelines

Author: PProfizi

.github/workflows/test_docker.yml

@@ -51,6 +51,9 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: "Setup Graphviz"
+        uses: ts-graphviz/setup-graphviz@v2
+
       - name: "Install requirements"
         run: pip install -r requirements/requirements_build.txt
 

.github/workflows/tests.yml

@@ -114,6 +114,9 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: "Setup Graphviz"
+        uses: ts-graphviz/setup-graphviz@v2
+
       - name: "Update pip to the latest version and install tox"
         shell: pwsh
         run: |