u_trace: helpers for tracing tiling GPUs and re-usable VK cmdbuffers

u_trace: helpers for tracing tiling GPUs and re-usable VK cmdbuffers

Re-usable command buffer could be resubmitted any number of times,
but tracepoints are written once. u_trace_clone_append allows
copying tracepoints and copying timestamps if GPU doesn't support
writing timestamps into indirect address.

The case of tiling GPUs is similar, command stream for draws is
resubmitted for each tile.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10969>