[FEATURE REQUEST] Grain to assess whether minion is a fiber channel host

[tacerus]

Is your feature request related to a problem? Please describe.

For pillar logic it can be useful to know whether a minion is capable of hosting fiber channel storage.

Describe the solution you'd like

A grains function returning a boolean value if /sys/class/fc_host exists.

Describe alternatives you've considered

I found #38184 which would return port names, but it seems it was never implemented. If it was, one could alternatively to the boolean idea assess whether the system is a fc_host based on whether ports exist.

Additional context

I will submit a patch for this.

Please Note
If this feature request would be considered a substantial change or addition, this should go through a SEP process here https://github.com/saltstack/salt-enhancement-proposals, instead of a feature request.