Check if temp_dir is subdir of virtualenv, to prevent problem of runtime virtualenv (#58084)

If temp_dir is a subdirectory of current virtualenv root, it will cause
copying files recursively and not finishing when ray try to create
runtime virtualenv.

## Description
If temp_dir is a subdirectory of current virtualenv root, when we submit
a task, and specify pip dependencies, ray will create a runtime
virtualenv, cause copying directories recursively, and runtime
virtualenv directory explosion.

---------

Signed-off-by: ideal <[email protected]>

Author: ideal

python/ray/_private/parameter.py

@@ -1,5 +1,6 @@
 import logging
 import os
+import pathlib
 from typing import Dict, List, Optional
 
 import ray._private.ray_constants as ray_constants
@@ -436,6 +437,22 @@ def build_error(resource, alternative):
         if self.temp_dir is not None and not os.path.isabs(self.temp_dir):
             raise ValueError("temp_dir must be absolute path or None.")
 
+        if self.temp_dir is not None and os.getenv("VIRTUAL_ENV"):
+            is_relative = True
+            try:
+                (
+                    pathlib.Path(self.temp_dir)
+                    .resolve()
+                    .relative_to(pathlib.Path(os.getenv("VIRTUAL_ENV")).resolve())
+                )
+            except ValueError:
+                is_relative = False
+
+            if is_relative:
+                raise ValueError(
+                    "temp_dir must not be child directory of virtualenv root"
+                )
+
     def _format_ports(self, pre_selected_ports):
         """Format the pre-selected ports information to be more human-readable."""
         ports = pre_selected_ports.copy()