[inductor] fix munge_exc not support windows path (#134348)

Windows file path use `\` as delimiter, it is also a escape character. We need translate all path `\` to `/`. which like Linux.

Reproduce UT:
```cmd
pytest test\dynamo\test_higher_order_ops.py -v -k test_vmap_grad_vmap_guard_fail
```
Error msg:
```cmd
________________________________________________________________________________________________________ HigherOrderOpVmapGuardTests.test_vmap_grad_vmap_guard_fail _________________________________________________________________________________________________________
Traceback (most recent call last):
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\site-packages\torch\testing\_internal\logging_utils.py", line 89, in test_fn
    fn(self, records)
  File "D:\xu_git\dnnl_cb\pytorch\test\dynamo\test_higher_order_ops.py", line 2714, in test_vmap_grad_vmap_guard_fail
    munge_exc(record.getMessage()),
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\site-packages\torch\testing\_internal\common_utils.py", line 5252, in munge_exc
    s = re.sub(file, os.path.basename(file), s)
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\re.py", line 209, in sub
    return _compile(pattern, flags).sub(repl, string, count)
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\re.py", line 303, in _compile
    p = sre_compile.compile(pattern, flags)
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\sre_compile.py", line 788, in compile
    p = sre_parse.parse(p, flags)
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\sre_parse.py", line 955, in parse
    p = _parse_sub(source, state, flags & SRE_FLAG_VERBOSE, 0)
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\sre_parse.py", line 444, in _parse_sub
    itemsappend(_parse(source, state, verbose, nested + 1,
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\sre_parse.py", line 526, in _parse
    code = _escape(source, this, state)
  File "C:\Users\Xuhan\.conda\envs\win_mkl_static\lib\sre_parse.py", line 370, in _escape
    raise source.error("incomplete escape %s" % escape, len(escape))
re.error: incomplete escape \x at position 2

To execute this test, run the following from the base repo dir:
    python test\dynamo\test_higher_order_ops.py HigherOrderOpVmapGuardTests.test_vmap_grad_vmap_guard_fail

This message can be suppressed by setting PYTORCH_PRINT_REPRO_ON_FAILURE=0
--------------------------------------------------------------------------------------------------------------------------- Captured stdout call ----------------------------------------------------------------------------------------------------------------------------
frames [('total', 2), ('ok', 2)]
inductor []
inline_call []
stats [('calls_captured', 38), ('unique_graphs', 2)]
--------------------------------------------------------------------------------------------------------------------------- Captured stderr call ----------------------------------------------------------------------------------------------------------------------------
V0824 01:29:00.148000 27840 torch\_dynamo\guards.py:2787] [0/1] [__recompiles] Recompiling function fn in D:\xu_git\dnnl_cb\pytorch\test\dynamo\test_higher_order_ops.py:2699
V0824 01:29:00.148000 27840 torch\_dynamo\guards.py:2787] [0/1] [__recompiles]     triggered by the following guard failure(s):
V0824 01:29:00.148000 27840 torch\_dynamo\guards.py:2787] [0/1] [__recompiles]     - 0/0: torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'error')])  # _dynamo\output_graph.py:479 in init_ambient_guards
========================================================================================================================== short test summary info ==========================================================================================================================
FAILED [0.7452s] test/dynamo/test_higher_order_ops.py::HigherOrderOpVmapGuardTests::test_vmap_grad_vmap_guard_fail - re.error: incomplete escape \x at position 2
```
Local test passed:
<img width="860" alt="image" src="https://github.com/user-attachments/assets/90f0d780-0639-4c03-8d7c-6f227c93a3fc">

Pull Request resolved: https://github.com/pytorch/pytorch/pull/134348
Approved by: https://github.com/jansel

torch/testing/_internal/common_utils.py

@@ -72,6 +72,7 @@ import torch.backends.xnnpack
 import torch.cuda
 from torch import Tensor
 from torch._C import ScriptDict, ScriptList  # type: ignore[attr-defined]
+from torch._dynamo.trace_rules import _as_posix_path
 from torch._utils_internal import get_writable_path
 from torch.nn import (
     ModuleDict,
@@ -96,14 +97,12 @@ from torch.testing._comparison import not_close_error_metas
 from torch.testing._internal.common_dtype import get_all_dtypes
 from torch.utils._import_utils import _check_module_exists
 import torch.utils._pytree as pytree
-
 try:
     import pytest
     has_pytest = True
 except ImportError:
     has_pytest = False
 
-
 def freeze_rng_state(*args, **kwargs):
     return torch.testing._utils.freeze_rng_state(*args, **kwargs)
 
@@ -5233,7 +5232,8 @@ def munge_exc(e, *, suppress_suffix=True, suppress_prefix=True, file=None, skip=
     if file is None:
         file = inspect.stack()[1 + skip].filename  # skip one frame
 
-    s = str(e)
+    file = _as_posix_path(file)
+    s = _as_posix_path(str(e))
 
     # Remove everything that looks like stack frames in NOT this file
     def repl_frame(m):
@@ -5249,9 +5249,8 @@ def munge_exc(e, *, suppress_suffix=True, suppress_prefix=True, file=None, skip=
     s = re.sub(r'  File "([^"]+)", line \d+, in (.+)\n(    .+\n( +[~^]+ *\n)?)+', repl_frame, s)
     s = re.sub(r"line \d+", "line N", s)
     s = re.sub(r".py:\d+", ".py:N", s)
-    s = re.sub(file, os.path.basename(file), s)
-    s = re.sub(os.path.join(os.path.dirname(torch.__file__), ""), "", s)
-    s = re.sub(r"\\", "/", s)  # for Windows
+    s = re.sub(file, _as_posix_path(os.path.basename(file)), s)
+    s = re.sub(_as_posix_path(os.path.join(os.path.dirname(torch.__file__), "")), "", s)
     if suppress_suffix:
         s = re.sub(r"\n*Set TORCH_LOGS.+", "", s, flags=re.DOTALL)
         s = re.sub(r"\n*You can suppress this exception.+", "", s, flags=re.DOTALL)