nvidia_gpu_prometheus_exporter

adding flags to disable features not supported by 'GTX 1650 Ti with Max-Q Design'

Normalize units (watts instead of milliwatts, joules instead of

Added video_encoder_capacity_h264 and _hevc. Added unit to some metrics.

Remove deprecated nvmlDeviceGetPowerState

Add _mhz to the video clock variables. Export throttling reason.