add python root bin to windows load path. (#146573)

This PR is extend python root bin path to dll load list.
It makes PyTorch robust and compatible to more dependency libraries, such as `intel-pti`.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/146573
Approved by: https://github.com/EikanWang, https://github.com/albanD

torch/__init__.py

@@ -167,6 +167,7 @@ if sys.platform == "win32":
         usebase_path = os.path.join(
             sysconfig.get_config_var("userbase"), "Library", "bin"
         )
+        py_root_bin_path = os.path.join(sys.exec_prefix, "bin")
 
         # When users create a virtualenv that inherits the base environment,
         # we will need to add the corresponding library directory into
@@ -179,7 +180,13 @@ if sys.platform == "win32":
 
         dll_paths = [
             p
-            for p in (th_dll_path, py_dll_path, base_py_dll_path, usebase_path)
+            for p in (
+                th_dll_path,
+                py_dll_path,
+                base_py_dll_path,
+                usebase_path,
+                py_root_bin_path,
+            )
             if os.path.exists(p)
         ]