fix(render): correct Vulkan offscreen barriers and submission order

[saadndm]

Fixes:

vkQueueSubmit2KHR(): pSubmits[0] command buffer VkCommandBuffer ... expects VkImage ... to be in layout VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL--instead, current layout is VK_IMAGE_LAYOUT_GENERAL.
  knot//...NativeVulkanService.midFrameFlush(NativeVulkanService.kt:150)
  knot//...MinecraftItemCatalogService.renderAtlas(MinecraftItemCatalogService.kt:490)

vkQueueSubmit2KHR(): WRITE_AFTER_WRITE hazard detected. vkCmdPipelineBarrier ... writes to VkImage ..., which was previously written at the end of subpass 0 (vkCmdEndRenderPass) by the attachment storeOp ...
  No sufficient synchronization is present to ensure that a layout transition does not conflict with a prior write (VK_ACCESS_2_COLOR_ATTACHMENT_WRITE_BIT) at VK_PIPELINE_STAGE_2_COLOR_ATTACHMENT_OUTPUT_BIT.
  Hint: Ensure that srcStageMask includes VK_PIPELINE_STAGE_2_COLOR_ATTACHMENT_OUTPUT_BIT and srcAccessMask includes VK_ACCESS_2_COLOR_ATTACHMENT_WRITE_BIT.