Prevent scanning of debug files from the current working directory on…

… Windows (#38085)

Fixes #36911

[SymSetOptions](https://docs.microsoft.com/en-us/windows/win32/api/dbghelp/nf-dbghelp-symsetoptions) docs say this about SYMOPT_IGNORE_CVREC:
> Ignore path information in the CodeView record of the image header when loading a .pdb file.

src/init.c

@@ -656,8 +656,8 @@ void _julia_init(JL_IMAGE_SEARCH rel)
  jl_winsock_handle = jl_dlopen("ws2_32.dll", 0);
  jl_exe_handle = GetModuleHandleA(NULL);
  JL_MUTEX_INIT(&jl_in_stackwalk);
- SymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_LINES);
- if (!SymInitialize(GetCurrentProcess(), NULL, 1)) {
+ SymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_LINES | SYMOPT_IGNORE_CVREC);
+ if (!SymInitialize(GetCurrentProcess(), "", 1)) {
  jl_printf(JL_STDERR, "WARNING: failed to initialize stack walk info\n");
  }
  needsSymRefreshModuleList = 0;