[Requirement] Check for not using Invoke-WebRequest

[gep13]

There already is a guideline that includes invoke-webrequest:

https://github.com/chocolatey/package-validator/blob/ad59a9936d2c4e9a114e52a4dbf63fe13753017c/src/chocolatey.package.validator/infrastructure.app/rules/ScriptsDoNotUseDownloadersGuideline.cs

This should likely be split up and added as another rule