Fix Win+CUDA builds using VS2017 (#94091)
Summary:
Followup after https://github.com/pytorch/pytorch/pull/93267
Generated by running:
```
for i in *.cu; do sed -i -e "s/constexpr char/CONSTEXPR_EXCEPT_WIN_CUDA char/" $i; done
```
Otherwise, attempts to compile using VS-15.9 results in:
```
D:\pytorch\aten\src\aten\native\cuda\laguerre_polynomial_l.cu(17): fatal error C1001: An internal error has occurred in the compiler.
(compiler file 'msc1.cpp', line 1518)
To work around this problem, try simplifying or changing the program near the locations listed above.
Please choose the Technical Support command on the Visual C++
Help menu, or open the Technical Support help file for more information
Internal Compiler Error in D:\VC\Tools\MSVC\14.16.27023\bin\Hostx64\x64\cl.exe. You will be prompted to send an error report to Microsoft later.
INTERNAL COMPILER ERROR in 'D:\VC\Tools\MSVC\14.16.27023\bin\Hostx64\x64\cl.exe'
Please choose the Technical Support command on the Visual C++
Help menu, or open the Technical Support help file for more information
```
Test Plan: CI
Differential Revision: D43011140
Pull Request resolved: https://github.com/pytorch/pytorch/pull/94091
Approved by: https://github.com/seemethere
