tu: Move vsc_data and vsc_data2 allocation into the device

tu: Move vsc_data and vsc_data2 allocation into the device

In addition to preparing us for dynamically resizing them, which has to
be controlled by the device, this greatly reduces the memory usage when
allocating large numbers of command buffers, making
dEQP-VK.api.object_management.max_concurrent.command_buffer_primary go
from crash -> pass.

Reviewed-by: Kristian H. Kristensen <hoegsberg@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3621>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3621>