[lldb][windows] _wsopen_s does not accept bits other than _S_IREAD | _S_IWRITE

When sending file from a Linux host to a Windows remote, Linux host will try to copy the source file's permission bits, which will contain `_S_I?GRP` and `_S_I?OTH` bits. Those bits are rejected by `_wsopen_s`, causing it to return EINVAL.

This patch masks out the rejected bits.

GitHub issue: #64313

Reviewed By: jasonmolenda, DavidSpickett

Differential Revision: https://reviews.llvm.org/D156817

(cherry picked from commit 9a4b3fd)

Author: yshui

lldb/source/Host/windows/FileSystem.cpp

@@ -101,6 +101,8 @@ int FileSystem::Open(const char *path, int flags, int mode) {
   std::wstring wpath;
   if (!llvm::ConvertUTF8toWide(path, wpath))
     return -1;
+  // All other bits are rejected by _wsopen_s
+  mode = mode & (_S_IREAD | _S_IWRITE);
   int result;
   ::_wsopen_s(&result, wpath.c_str(), flags, _SH_DENYNO, mode);
   return result;