Create crossgen symbols for Windows x64 and x86

[TravisEz13]

PR Summary

Create crossgen symbols

PR Context

PR Checklist

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• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
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  • Experimental feature(s) needed
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  • Documentation needed
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  • N/A or can only be tested interactively
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  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
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    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode (which runs in a different PS Host).
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    • 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]

related PR #12167

[ghost]

🎉v7.1.0-preview.1 has been released which incorporates this pull request.:tada:

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