
For zink, we want to know if we should pass command stream markers down to the underlying driver, but we don't have our own trace context we're recording trace events with. We definitely want those markers if the underlying driver is going to be doing perfetto tracing, or is requesting marker tracing. So, create an interface for querying those flags before they get copied down to an actual u_trace_context. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20657>