turnip: Execute main cs for secondary command buffers

turnip: Execute main cs for secondary command buffers

Previously, we only added the secondary command buffer's draw and
draw epilogue command streams to the primary command buffer on
vkCmdExecuteCommands. However, we also need to merge the primary cs
for non-draw operations like vkCmdCopyBuffer and vkCmdBeginQuery.

Fixes dEQP-VK.memory.pipeline_barrier.host_write_transfer_src.*
and various other tests in dEQP-VK.api.command_buffers.*.

Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3988>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3988>