`xrCreateActionSpace` fails with `XR_ERROR_PATH_UNSUPPORTED` for Vive trackers on SteamVR 2.12.3+

[nicoco007]

This may be related to #1899 but since it wasn't fixed by the latest version I thought I'd create a new issue. Since 2.12.3, xrCreateActionSpace fails with XR_ERROR_PATH_UNSUPPORTED for all Vive tracker roles. This is not the case on 2.12.2.

I've created a sample project in Unity to demonstrate the issue. It's a little weird because it's in C# but the important part is the RunTest method in the ViveTrackerOpenXRFeature which is essentially a recreation of the sample code provided in the spec. It'll run immediately when entering Play mode.

On SteamVR 2.12.2, you should see:

but on SteamVR 2.12.3 and 2.12.4, it's now:

(Unity has defined XR_ERROR_PATH_UNSUPPORTED as simply PathUnsupported)