[inputs.nvidia-smi] add ecc fields

### Use Case

I want to be able to monitor different correctable and uncorrectable ecc errors from different components of the GPU. This will help me with spotting misbehaving GPUs early and handle the issues.

I saw that the data is already parsed, but simply not returned as a field.

### Expected behavior

nvidia-smi plugin should also send fields for ecc errors (correctable & uncorrectable)

### Actual behavior

no ecc errors are exported

### Additional info

Maybe (for backwards compatibility) we can have a config field for extra fields to export? just an idea...

Start by locating the inputs.nvidia-smi plugin and inspect where parsed ECC data is currently handled but not returned. Completion means exporting correctable and uncorrectable ECC error fields for the relevant GPU components; the payload does not name a file or test to run.

Written by the indexing model from the issue text.