anv: split INTEL_MEASURE multi events

Measure performance of each draw separately in multi_draw event.
Previously, we measured duration of the sum of all draws launched
per multi_draw. This should provide more detailed data for
multi_draws.

Reviewed-by: Mark Janes <markjanes@swizzler.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21505>
1 file changed