[PATCH v3 0/7] MR6892: dlls/propsys: Implement IPropertyDescription for several known system properties.

[Vibhav Pant (＠vibhavp)]

This MR adds a very basic implementation of `IPropertyDescription` for system defined properties (i.e, the ones in <propkey.h>). This is needed to support the [`Properties`](https://learn.microsoft.com/en-us/uwp/api/windows.devices.enumeration.device...) method for `IDeviceInformation` in Windows.Devices.Enumeration (!6874).

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  v3: dlls/propsys: Implement IPropertyDescription for several known system properties.
      dlls/propsys: Add IPropertyDescription stub for system defined properties.
      dlls/propsys/tests: Add conformance tests for PSGetNameFromPropertyKey.
      dlls/propsys: Add stubs for PSGetNameFromPropertyKey.
      dlls/propsys: Add stubs for PropertySystem.
      dlls/propsys/tests: Add conformance tests for PSGetPropertyKeyFromName.
      dlls/propsys/tests: Add conformance tests for getting PropertyDescriptions from PropertySystem.

https://gitlab.winehq.org/wine/wine/-/merge_requests/6892