[PATCH v4 0/4] MR6526: propsys: Initially implement PropVariantToVariant.

[Ziqing Hui (＠zhui)]

--
  v4: propsys: Initially implement PropVariantToVariant.
      propsys: Support converting clsid to string for PropVariant.
      propsys/tests: Test converting clsid to string.
      propsys/tests: Add tests for PropVariantToVariant.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/6526