fix: disable poetry usage (py-doc)

templates/gitlab-ci-python.yml

@@ -113,7 +113,7 @@ variables:
   }
 
   function install_doc_requirements() {
-    if [[ -f "pyproject.toml" ]]; then
+    if [[ -f "pyproject.toml" ]] && [[ "${PYTHON_POETRY_DISABLED}" != "true" ]]; then
       if  [[ ! -f "poetry.lock" ]]; then 
         log_error "Poetry detected but \\e[33;1mpoetry.lock\\e[0m file not found: you shall commit it with your project files"
         exit 1