chore: refactor workflow writting (#2225)

# What does this PR do?

Use a composite action to avoid similar steps repetitions and
centralization of the defaults.

Signed-off-by: Sébastien Han <seb@redhat.com>

.github/workflows/integration-auth-tests.yml

@@ -30,16 +30,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
-      - name: Install uv
-        uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
-        with:
-          python-version: "3.10"
-          activate-environment: true
+      - name: Install dependencies
+        uses: ./.github/actions/setup-runner
 
-      - name: Set Up Environment and Install Dependencies
+      - name: Build Llama Stack
         run: |
-          uv sync --extra dev --extra test
-          uv pip install -e .
           llama stack build --template ollama --image-type venv
 
       - name: Install minikube
@@ -109,7 +104,6 @@ jobs:
           yq eval '.server.auth.config.jwks = {"uri": "${{ env.KUBERNETES_API_SERVER_URL }}"}' -i $run_dir/run.yaml
           cat $run_dir/run.yaml
 
-          source .venv/bin/activate
           nohup uv run llama stack run $run_dir/run.yaml --image-type venv > server.log 2>&1 &
 
       - name: Wait for Llama Stack server to be ready