Wrap konfig load from scripts tests to avoid changing CWD (#4067)

* chore: add utility method to get konfig from scripts tests

Local scripts specs should be be caught by the changing current
directory when loading `konfig.coffee` (which loads `cwd.coffee`,
which changes the cwd to `packages/server`). This was throwing
snapshot tests into saving into a wrong folder until I have noticed
this and fixed in
[v8.0.3](https://github.com/bahmutov/snap-shot-core/releases/tag/v8.0.3)

* linting

* add more comments

scripts/binary/util/upload.coffee

@@ -9,7 +9,7 @@ fs = require("fs")
 os = require("os")
 Promise = require("bluebird")
 {configFromEnvOrJsonFile, filenameToShellVariable} = require('@cypress/env-or-json-file')
-konfig  = require("../../../packages/server/lib/konfig")
+konfig = require('../../binary/get-config')()
 
 formHashFromEnvironment = () ->
   env = process.env