Vulkan loader does not support unicode strings in ImplicitLayers registry

[YueLu0116]

Describe the bug
If ImplicitLayers' manifest paths containing Chinese characters (for example), they cannot be loaded.

Environment (please complete the following information):

• OS: Windows 11
• Bitdepth: 64-bit
• GPU: NVIDIA GEFORCE RTX 3060 Ti
• Graphics Driver: Nvidia 551.23
• SDK or header version if building from repo:
• Enabled layers:

To Reproduce
Steps to reproduce the behavior:
Just as titled

VK_LOADER_DEBUG output
Attach output when running with the environment variable VK_LOADER_DEBUG=all

ERROR:             	
loader_get_json: Failed to open JSON file D:\debug\测试\exec64d\SDKVulkanLayer64.json

Additional context
For example, the correct path is:
D:\debug\测试\exec64d\SDKVulkanLayer64.json

In loader_windows.c @430
key and name are typed with char array which means ASCII version APIs are used.

  while (*loc) {
      next = loader_get_next_path(loc);
      access_flags = KEY_QUERY_VALUE;
      rtn_value = RegOpenKeyEx(hive, loc, 0, access_flags, &key);
      if (ERROR_SUCCESS == rtn_value) {
          for (DWORD idx = 0;
               (rtn_value = RegEnumValue(key, idx++, name, &name_size, NULL, NULL, (LPBYTE)&value, &value_size)) == ERROR_SUCCESS;
          // ...
      } 
}

So I must set path as utf8 encoding in registry. Which looks like this in RegEditor (got garbled characters):
D:\debug\鏃笢\exec64d\SDKVulkanLayer64.json