Loader Settings: additional drivers with additional_drivers_use_exclusively=false doesn't allow to run additional drivers as GPU0

With `device_configurations`, we can list devices including additional drivers.

```
Devices:
========
GPU0:
apiVersion = 1.4.305
driverVersion = 0.0.1
vendorID = 0x10005
deviceID = 0x0000
deviceType = PHYSICAL_DEVICE_TYPE_CPU
deviceName = llvmpipe (LLVM 20.1.6, 256 bits)
driverID = DRIVER_ID_MESA_LLVMPIPE
driverName = llvmpipe
driverInfo = Mesa 25.0.7 (git-35721f1986) (LLVM 20.1.6)
[Vulkan Loader] DEBUG | LAYER: Unloading layer library C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_02bdcff75475bcf9\.\nvoglv64.dll

conformanceVersion = 1.3.1.1
deviceUUID = 6d657361-3235-2e30-2e37-000000000000
driverUUID = 6c6c766d-7069-7065-5555-494400000000
GPU1:
apiVersion = 1.3.271
driverVersion = 101.5186
vendorID = 0x8086
deviceID = 0x56a1
deviceType = PHYSICAL_DEVICE_TYPE_DISCRETE_GPU
deviceName = Intel(R) Arc(TM) A750 Graphics
driverID = DRIVER_ID_INTEL_PROPRIETARY_WINDOWS
driverName = Intel Corporation
driverInfo = Intel driver
conformanceVersion = 1.3.6.3
deviceUUID = 8680a156-0800-0000-0e00-000000000000
driverUUID = 33312e30-2e31-3031-2e35-313836000000
GPU2:
apiVersion = 1.3.295
driverVersion = 553.22.0.0
vendorID = 0x10de
deviceID = 0x2208
deviceType = PHYSICAL_DEVICE_TYPE_DISCRETE_GPU
deviceName = NVIDIA GeForce RTX 3080 Ti
driverID = DRIVER_ID_NVIDIA_PROPRIETARY
driverName = NVIDIA
driverInfo = 553.22
conformanceVersion = 1.3.8.2
deviceUUID = bc4a01b1-5641-8058-47a8-151a395a80c7
driverUUID = 1a8cb5ae-3ba9-590a-8ba4-a405828f4748
```

However, when putting the additional drivers first, as "GPU0", running vkcube shows the the GPU1 is used instead.

When moving a "typically" drivers first, then this typically drivers is used. In my case, this typical driver could be either my Nvidia or Intel GPU.