Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54963

AudioPaths are created from IDirectMusicPerformance::CreateAudioPath and CreateStandardAudioPath, and
don't have an IDirectMusicObject or an IPersistStream interface. On the other hand AudioPathConfigs
are loaded from files, and do have IDirectMusicObject and IPersistStream.

They were somehow confused with each other and implemented in the same struct, this commit fixes that.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46904

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52399

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56223

Satisfies driver version check in Counter Strike 2.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56174

In ntoskrnl.exe, when a PnP device interface is registered, the
interface path casing is retained, with only the hardware ID being upper
case. Thus, this patch looks to align the behaviour between PnP and
rawinput, particularly for games that seem to rely on these two strings
being consistent for hotplug.

This updated behaviour also seems consistent with Windows.