Enable-SSHRemoting bug workaround improvement/modernization - Favor symlink over 8.3 and improve 8.3 fallback command

[dodexahedron]

Prerequisites

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Links

https://learn.microsoft.com/en-us/powershell/scripting/security/remoting/ssh-remoting-in-powershell

Summary

The documentation for Enable-SSHRemoting has a callout for a bug and a suggested workaround which uses DOS 8.3-style paths.

This won't work on systems or volumes with 8.3 names disabled and is a legacy solution anyway.

Instead, a symlink can be used by creating one at an appropriate path and using that path.

Also, the instructions for determining the 8.3 name aren't quite complete, and can be improved to provide a full path for the user, to make it easier if they need to use that method as a fallback.

I have changes ready to go (PR coming shortly) which introduce the symlink method, modify the 8.3 method to provide the full path to the user's current pwsh.exe, discourage use of the 8.3 names except as a fallback, and explain why it's a fallback.

[dodexahedron]

PR #12108 is filed and ready for review.