[PATCH v2 0/3] MR8604: propsys: Implement PropVariantChangeType(VT_CLSID) for string types.

[Vibhav Pant (＠vibhavp)]

Also, add todo'd conformance tests for converting to and from `VT_ARRAY | VT_UI1` values.

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  v2: propsys/tests: Add test for PropVariantToGUID with VT_ARRAY | VT_UI1 values.

https://gitlab.winehq.org/wine/wine/-/merge_requests/8604