Add TryPSGetInfo utility function to read resource installation file data

[PaulHigin]

PR Summary

This PR adds a new TryPSGetInfo utility method to read a PSGetModuleInfo.xml file.

PR Context

The PSGetModuleInfo.xml file is a PowerShell serialization file that contains information about an installed module or other resource type. The format of the install information is inconsistent but appears to be the same for all installed resources. This method can be modified as needed to accommodate other resource types if needed.

Testing adds an example xml file for now, but eventually should be expanded to include writing this installation information and then reading it.

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• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
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[anamnavi]

LGTM. I like the idea of having the CheckForExpectedPSGetInfo function in PSGetTestUtils file.