Variable TRACE_BINDING_NAMES`Const`

TRACE_BINDING_NAMES: readonly [
    "bvhTraceNodes",
    "bvhTraceTriangles",
    "bvhTraceTopLevel",
    "bvhTracePositions",
] = ...

The names traceModuleWgsl gives its bindings, in binding order (the fourth is an indexed scene's positions).