Check pwsh.exe and pwsh in daily version on Windows

[centreboard]

PR Summary

Check for pwsh.exe on Windows to get the daily version currently installed

PR Context

Improves on #10489
On Windows pwsh doesn't exist so the same daily version was reinstalled when calling
iex "& {$(irm aka.ms/install-powershell.ps1)} -Daily"

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: or [ WIP ] to the beginning of the title (the WIP bot will keep its status check at Pending while the prefix is present) and remove the prefix when the PR is ready.
• Breaking changes
  • None
  • OR
  • Experimental feature(s) needed
    • Experimental feature name(s):
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
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  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
  • OR
  • I have considered the user experience from a tooling perspective and enumerated concerns in the summary. This may include:
    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode (which runs in a different PS Host).
    • Impact on Completions (both in the console and in editors) - one of PowerShell's most powerful features.
    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
    • Impact on EditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).

[TravisEz13]

There is a failure unrelated to your change, which is blocking this PR.
https://powershell.visualstudio.com/PowerShell/_build/results?buildId=34391&view=logs&jobId=68b94060-b87a-5de8-40f0-78718e402518&taskId=50e847f0-73a2-533f-c084-25a3970df96e&lineStart=36&lineEnd=37&colStart=1&colEnd=1
Do you want to fix or do you want me to?

[centreboard]

@TravisEz13 Could you please look at it? I don't have a mac and naively replacing caskroom/cask with homebrew/cask-cask didn't work for me in Azure Pipelines.

[TravisEz13]

I've opened #10752 to fix the issue. I'll help update this PR once we have fixed that issue.

[TravisEz13]

The other PR was merged. I retried your test.

[TravisEz13]

@PoshChan Please remind me in 1 hour

[PoshChan]

@TravisEz13, this is the reminder you requested 1 hour ago

[TravisEz13]

Thanks for your contribution

[bergmeister]

Awesome, thanks :-)

[ghost]

🎉v7.0.0-preview.5 has been released which incorporates this pull request.:tada:

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