create full venv for system_python

Author: rickeylev

python/private/py_executable.bzl

@@ -513,7 +513,7 @@ def _create_zip_main(ctx, *, stage2_bootstrap, runtime_details, venv):
 # * https://github.com/python/cpython/blob/main/Modules/getpath.py
 # * https://github.com/python/cpython/blob/main/Lib/site.py
 def _create_venv(ctx, output_prefix, imports, runtime_details, add_runfiles_root_to_sys_path):
-    create_full_venv = BootstrapImplFlag.get_value(ctx) == BootstrapImplFlag.SCRIPT
+    create_full_venv = True
     venv = "_{}.venv".format(output_prefix.lstrip("_"))
 
     if create_full_venv: