Add UseUsingScopeModifierInNewRunspaces rule

[Jawz84]

PR Summary

Fixes #1410

• write tests
• write documentation
• draft rudimentary rule
• tune rule until all tests for this rule pass (except the test for built-in vars)
• adapt other rules that start failing
• add support for built-in variable detection
• expand functionality to other commands /situations where this check makes sense
  • added support for InlineScript, Start-(Thread)Job and Invoke-Command
• finetune
• implement suggested correction (Replace $var with $using:var)
  • add test for suggested correction
• refactor to AstVisitor/AstVisitor2
• add support for DSC Script Resource (SetScript, GetScript, TestScript)

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Change is not breaking
• Make sure all .cs, .ps1 and .psm1 files have the correct copyright header
• Make sure you've added a new test if existing tests do not effectively test the code changed and/or updated documentation
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: to the beginning of the title and remove the prefix when the PR is ready.