Ability to exclude device from smartctl scan

[k3nny0ne]

I want do exclude some specific devices from metrics collection (like, NVMe).
It would be cool to specify them in command line (e.g. --smartctl.exclude /dev/nvme1 --smartctl.exclude /dev/nvme2 ...).

[SuperQ]

Seems like a reasonable idea. PRs welcome. There's an example device filter pattern in the node_exporter that can be used here.

[k0ste]

This is the same was #72

[SuperQ]

@k0ste I think this is similar, but not exactly the same.