feat: read golden json using fsspec

[ikrommyd]

This will allow reading golden json over https

[lgray]

Please add in tests that use new features!

[ikrommyd]

I don't understand why this works:

import fsspec
import json

with fsspec.open("tests/samples/Cert_294927-306462_13TeV_EOY2017ReReco_Collisions17_JSON.txt") as f:
    d = json.load(f)

while this doesn't:

import fsspec
import json

with fsspec.open("https://github.com/CoffeaTeam/coffea/blob/master/tests/samples/Cert_294927-306462_13TeV_EOY2017ReReco_Collisions17_JSON.txt") as f:
    d = json.load(f)

it fails with JSONDecodeError: Expecting value: line 7 column 1 (char 6)

[ikrommyd]

nvm I'm stupid. Just needs the raw content