Allow PowerShellGroup to override psmodulepath

[anmenaga]

PR Summary

Fix #285

PR Context

The PSModulePath env var is clobbered within the group resource (thus PSDSC is still found by the default env var). The string value would be PS syntax and expanded within the group resource.

properties:
  psmodulepath: $env:PSModulePath;$env:LOCALAPPDATA\Microsoft\WinGet\Configuration\Modules
  resources: ...