[Misc] Replace urllib's urlparse with urllib3's parse_url (#32746)

Signed-off-by: Isotr0py <mozf@mail2.sysu.edu.cn>

vllm/envs.py

@@ -439,9 +439,9 @@ def get_vllm_port() -> int | None:
     try:
         return int(port)
     except ValueError as err:
-        from urllib.parse import urlparse
+        from urllib3.util import parse_url
 
-        parsed = urlparse(port)
+        parsed = parse_url(port)
         if parsed.scheme:
             raise ValueError(
                 f"VLLM_PORT '{port}' appears to be a URI. "