Use standard __func__ macro in symbolic shape. (#89264)
Summary:
I saw the following issue only on Windows build in PR #88767:
```
RuntimeError: AttributeError: 'SymNode' object has no attribute 'torch::impl::PythonSymNodeImpl::ge'
```
It's only on Windows because we get the attributes of SymNode in C++ with
`__FUNCTION__` macro, which is not in C++ standard, therefore has platform specific behavior.
In this case, MSVC will include a function's namespace and class name, which is not intended here.
Instead we should use `__func__`. see: https://en.cppreference.com/w/cpp/language/function#Function_definition
godbolt example to show the difference: https://godbolt.org/z/PGfvecxPx
Test Plan:
CI
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Pull Request resolved: https://github.com/pytorch/pytorch/pull/89264
Approved by: https://github.com/ezyang
