[compiler-rt] [compiler-rt][asan] Add wcscpy/wcsncpy; enable wcscat/wcsncat on Windows (PR #160493)

[Yixuan Cao via llvm-commits]

Cao-Wuhui wrote:

> > @thurstond Could you please re-run CI for this PR? If anything else shows up, I’ll follow up quickly.
> 
> I've re-run it. Some minor formatting nits: https://github.com/llvm/llvm-project/actions/runs/18042370940/job/51521406858?pr=160493

Thanks for re-running CI! I checked the formatting nits locally with:
`python3 ./clang/tools/clang-format/git-clang-format --binary ./build/bin/clang-format --diff 5031c163ff82 HEAD`
It reported the pointer-spacing and preprocessor-indentation issues; I’ve applied the fixes and verified the diff is now clean. If anything else pops up, I’ll address it quickly.

https://github.com/llvm/llvm-project/pull/160493