Fix bulk fetch services after aviationweather.gov v3.0 update

[NickGlauberCirium]

Description

AviationWeather.gov released v3.0 today, which changed a bunch of their URLs.

This PR fixes both the NOAA_Bulk and NOAA_Intl services.

The path used for the stations.txt data used in avwx.stations.build_stations() no longer exists there, but I was unable to find a new path containing the same format. There's https://aviationweather.gov/api/data/stationinfo but that is a completely different format.

I'm sure the Scrape services also need updating as well, but have not looked myself yet.

Checklist

• [x] Tests covering the new functionality have been added (none added, updating existing behavior only)
• [x] Documentation has been updated OR the change is too minor to be documented
• [x] Changes are listed in the CHANGELOG.md OR changes are insignificant

[devdupont]

Thanks for the quick fix on this. Just started seeing it this morning. I'll switch the NOAA non-bulk to a separate method for the time being to get the tests cleared up.

[devdupont]

Thanks for the help on this. If you email me, I'll send you some stickers :)