Function wgpu_command_encoder_copy_buffer_to_buffer 

#[unsafe(no_mangle)]
pub extern "C" fn wgpu_command_encoder_copy_buffer_to_buffer(
    command_encoder_id: CommandEncoderId,
    source: BufferId,
    source_offset: BufferAddress,
    destination: BufferId,
    destination_offset: BufferAddress,
    size: BufferAddress,
)