Using the same buffer without a barrier actually can lead to data races as
drivers might not properly synchronize the content. Using the stream
uploader is a neat fix which prevents us from having to use a barrier but
still keep high throughput when launching kernels back-to-back.
Fixes: 5ff33f9905 ("rusticl: use real buffer for cb0 for drivers prefering")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27666>
(cherry picked from commit 8da8c6c2d8)
abce42ced6