Vulkan: Fix image layout issues after compute shader uploads.

We're already in GENERAL so probably not worth to transfer to DST just
to do even more transfers due to the silliness of GenerateMip.

I'm planning to rework the whole texture upload thing to be far more
optimal with some kind of TextureUploadManager

Fixes #13987

GPU/Vulkan/TextureCacheVulkan.cpp

@@ -930,6 +930,7 @@ void TextureCacheVulkan::BuildTexture(TexCacheEntry *const entry) {
 			void *data;
 			bool dataScaled = true;
 			if (replaced.Valid()) {
+				// Directly load the replaced image.
 				data = drawEngine_->GetPushBufferForTextureData()->PushAligned(size, &bufferOffset, &texBuf, pushAlignment);
 				replaced.Load(i, data, stride);
 				entry->vkTex->UploadMip(cmdInit, i, mipWidth, mipHeight, texBuf, bufferOffset, stride / bpp);
@@ -1010,7 +1011,7 @@ void TextureCacheVulkan::BuildTexture(TexCacheEntry *const entry) {
 
 		// Generate any additional mipmap levels.
 		for (int level = maxLevel + 1; level <= maxLevelToGenerate; level++) {
-			entry->vkTex->GenerateMip(cmdInit, level);
+			entry->vkTex->GenerateMip(cmdInit, level, computeUpload ? VK_IMAGE_LAYOUT_GENERAL : VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
 		}
 
 		if (maxLevel == 0) {