[Vulkan] Implement ClearCache to clear upload_buffer_pool

src/xenia/gpu/vulkan/vulkan_shared_memory.cc

@@ -209,6 +209,12 @@ void VulkanSharedMemory::Shutdown(bool from_destructor) {
   }
 }
 
+void VulkanSharedMemory::ClearCache() {
+  SharedMemory::ClearCache();
+
+  upload_buffer_pool_->ClearCache();
+}
+
 void VulkanSharedMemory::CompletedSubmissionUpdated() {
   upload_buffer_pool_->Reclaim(command_processor_.GetCompletedSubmission());
 }

src/xenia/gpu/vulkan/vulkan_shared_memory.h

@@ -35,6 +35,7 @@ class VulkanSharedMemory : public SharedMemory {
 
   bool Initialize();
   void Shutdown(bool from_destructor = false);
+  void ClearCache() override;
 
   void CompletedSubmissionUpdated();
   void EndSubmission();