Add operator presets for highway=street_lamp (CenterPoint Energy, Puget Sound Energy, and Seattle City Light)

[CorruptComputer]

CenterPoint Energy owns and operates all of the street lights in my area, having a preset for this would make it easy to add that info. Used this as a reference for the values of that:

name-suggestion-index/data/operators/power/line.json

Line 983 in 8c39905

"displayName": "CenterPoint Energy",

Discussed this in the OSM Discord, and someone had these values they were using for ones in their area, so I added them as well:
https://github.com/Lumikeiju/openstreetmap/blob/main/presets/seattle_city_light_pole.xml

[Snowysauce]

I like this idea - so much so that I filed a feature request with iD to make adding street light operator names easier. I don't personally map them, but a quick overpass turbo search of my area showed a couple hundred mapped lights, all without operator details. I can't help but think that's linked to currently having to add the operator via the "tags" section.

[CorruptComputer]

Thanks for that suggestion, I've opened a second PR over in the id-tagging-schema repo adding that as well:
openstreetmap/id-tagging-schema#1327