Running PowerShell Preview or Daily in CI

[bergmeister]

PR Summary

This is to show an example of running the Daily version of PowerShell in CI. Unfortunately one test fails (both in daily and preview in CI) but I cannot reproduce the issue locally. @rjmholt Could you have a look at the test.
This PR is not ready for review yet, it is just to show the failure first. After that I think would like the following:

• Have all jobs run in PowerShell LTS and Preview but only a nightly build definition with a variable defined to make it use the Daily build

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.
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