Add ingest of soundings from Wyoming

With #959, our upstream source of soundings was discontinued ( rucsoundings dot noaa dot gov). So an ingest was added using what SPC provides [here](https://www.spc.noaa.gov/exper/soundings/). It turns out that SPC's website does not provide a full suite of sounding sites that I was previously ingesting, le sigh. So I might as well get what Wyoming offers.