Doc new -CustomPipeName parameter on `pwsh` and `Enter-PSHostProcess`

[TylerLeonhardt]

Issue Details

In PowerShell/PowerShell#8889 we add the -CustomPipeName parameter on pwsh and Enter-PSHostProcess. This issue is to track documenting that feature.

Version(s) of document impacted

• Impacts 6.next document
• Impacts 6 document
• Impacts 5.1 document
• Impacts 5.0 document
• Impacts 4.0 document
• Impacts 3.0 document

Reason(s) for not selecting all version of documents

• The documented feature was introduced in selected version of PowerShell
• This issue only shows up in selected version of the document