Refactor Python environment setup method

Author: Jason2866

platform.py

@@ -824,9 +824,9 @@ def configure_default_packages(self, variables: Dict, targets: List[str]) -> Uni
         core_dir = ProjectConfig.get_instance().get("platformio", "core_dir")
 
         try:
-            self._penv_python, self._esptool_path = self._setup_python_environment(
-                None, self, core_dir, True
-            )
+            penv_python, esptool_path = _setup_pipenv_minimal(core_dir)
+            self._penv_python = penv_python
+            self._esptool_path = esptool_path
         except Exception as e:
             logger.error(f"Python environment setup failed: {e}")