Add a health status metric for every gpu card

[lx1036]

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I'm curious, why aren't there any health status metrics for every GPU card?

I check the NVIDIA/go-dcgm has function like HealthCheckByGpuId(gpuId uint) https://github.com/NVIDIA/go-dcgm/blob/main/pkg/dcgm/api.go#L102-L105 , and if we can get health status for every card, and export health metric.

[glowkey]

The next major version of DCGM-Exporter planned for sometime in the next few months will have a capability like this. Stay tuned.