[Revamp pipeline thread handling] Support Enter-PSHostProcess and Debug-Runspace for Azure Functions etc.

[SydneyhSmith]

Enter-PSHostProcess debugging is both an essential form of debugging, but also essential for PowerShell Azure Functions Host support. Because of PowerShell's quirks, we have to do special things to support it.

https://github.com/PowerShell/PowerShellEditorServices/blob/9e1a17a3ceabc1dc856ce90f4aac177c971c5c0a/src/PowerShellEditorServices/Services/DebugAdapter/Handlers/DisconnectHandler.cs#L53-L70

https://github.com/PowerShell/PowerShellEditorServices/blob/1ffe6db32e3aaeed0866497ed32a35e96f937390/src/PowerShellEditorServices/Services/DebugAdapter/Handlers/LaunchAndAttachHandler.cs#L396-L413

https://github.com/PowerShell/PowerShellEditorServices/blob/29e44b6ebdc63de70bd06538db03f3298ba2cfc6/src/PowerShellEditorServices/Services/PowerShellContext/PowerShellContextService.cs#L1491-L1548

Also see:

https://github.com/PowerShell/PowerShellEditorServices/blob/9e1a17a3ceabc1dc856ce90f4aac177c971c5c0a/src/PowerShellEditorServices/Services/PowerShellContext/Session/RunspaceDetails.cs#L13-L323

[rjmholt]

To solve in https://github.com/PowerShell/PowerShellEditorServices/pull/1459

[JustinGrote]

FYI this has NOT been solved by #1459 and remains an open issue @andschwa CC @anatolib

[andyleejordan]

Can I react with a :sob: for that? :sob: