Fixes #11451 - Clean up docs on PSModulePath

[sdwheeler]

PR Summary

Clean up docs on PSModulePath

• Fixes AB#322985
• Fixes Feedback Expand-Archive creates folder in system temp called  #11450
• Fixes Documentation is convoluted and inexact #11451

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit c6ad45c:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Core/About/about_Modules.md	✅Succeeded	View (powershell-5.1)
reference/5.1/Microsoft.PowerShell.Core/About/about_PSModulePath.md	✅Succeeded	View (powershell-5.1)
reference/7.2/Microsoft.PowerShell.Core/About/about_Modules.md	✅Succeeded	View (powershell-7.2)
reference/7.2/Microsoft.PowerShell.Core/About/about_PSModulePath.md	✅Succeeded	View (powershell-7.2)
reference/7.2/Microsoft.PowerShell.Core/About/about_Windows_PowerShell_Compatibility.md	✅Succeeded	View (powershell-7.2)
reference/7.4/Microsoft.PowerShell.Core/About/about_Modules.md	✅Succeeded	View (powershell-7.4)
reference/7.4/Microsoft.PowerShell.Core/About/about_PSModulePath.md	✅Succeeded	View (powershell-7.4)
reference/7.4/Microsoft.PowerShell.Core/About/about_Windows_PowerShell_Compatibility.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Core/About/about_Modules.md	✅Succeeded	View (powershell-7.5)
reference/7.5/Microsoft.PowerShell.Core/About/about_PSModulePath.md	✅Succeeded	View (powershell-7.5)
reference/7.5/Microsoft.PowerShell.Core/About/about_Windows_PowerShell_Compatibility.md	✅Succeeded	View (powershell-7.5)

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