Allow LDCache to be used to discover libcuda.so in CDI spec generation

[elezar]

On systems where driver libraries are not installed at "standard" library paths the nvidia-ctk cdi generate --mode=nvml command fails with output similar to:

# nvidia-ctk cdi generate --output=/etc/cdi/nvidia.yaml
WARN[0000] Failed to locate nvidia-cdi-hook: pattern nvidia-cdi-hook not found
INFO[0000] Using /var/lib/nvidia/lib64/libnvidia-ml.so.535.183.06
INFO[0000] Auto-detected mode as 'nvml'                
INFO[0000] Selecting /dev/nvidia0 as /dev/nvidia0      
INFO[0000] Selecting /dev/dri/card0 as /dev/dri/card0  
INFO[0000] Selecting /dev/dri/renderD128 as /dev/dri/renderD128
WARN[0000] failed to locate libcuda.so: pattern libcuda.so.*.* not found
64-bit library libcuda.so.*.*: not found; using *.*
INFO[0000] Using driver version 535.183.06              
ERRO[0000] failed to generate CDI spec: failed to create edits common for entities: failed to create discoverer for common entities: failed to create discoverer for driver files: failed to create discoverer for driver libraries: failed to get libraries for driver version: failed to locate libcuda.so.535.183.06: pattern libcuda.so.535.183.06 not found
64-bit library libcuda.so.535.183.06: not found

This can be rectified by running:

nvidia-ctk cdi generate --mode=nvml --library-search-path=/var/lib/nvidia/lib64

In the past the LDCache could be used on such systems allowing libcuda.so to be discovered successfully.

This was reported in v1.16.2