update azure test pipeline to use apline image

devops/azure/override-stages.yml

@@ -96,7 +96,7 @@ azure_test_py:
     name: $CI_REGISTRY_IMAGE/${CI_PROJECT_NAME}-${CI_COMMIT_REF_SLUG}:${CI_COMMIT_SHA}
     entrypoint: [""]
   before_script:
-    - apt-get update && apt-get install -y curl jq
+    - apk update && apk install -y curl jq
     - pip install -q -r ./requirements_dev.txt
     - export BEARER_TOKEN=$(curl -ks -XPOST "https://login.microsoftonline.com/${AZURE_TENANT_ID}/oauth2/token" -d "grant_type=client_credentials&client_id=${AZURE_PRINCIPAL_ID}&client_secret=${AZURE_PRINCIPAL_SECRET}&resource=${AZURE_APP_ID}" | jq --raw-output '.access_token')
     - if [ -z $BEARER_TOKEN ]; then echo "[ERROR] Not able to get token (BEARER_TOKEN)"; exit 1; fi