Update on "[ET-VK] Store unique ptr to Tensor in Value instead of inl…

…ined tensor object, to reduce Value struct size from 448 to 80 bytes."

This diff aims to reduce the size of the Value struct in the Executorch Vulkan runtime by storing a unique pointer to the Tensor object instead of an inlined tensor object. This change reduces the size of the Value struct from 448 bytes to 80 bytes, which can improve performance and reduce memory usage.

Differential Revision: [D66655991](https://our.internmc.facebook.com/intern/diff/D66655991/)

[ghstack-poisoned]

backends/vulkan/runtime/graph/containers/Value.h

@@ -187,16 +187,16 @@ struct Value final {
       case TypeTag::SYMINT:
         payload.as_symint.~SymInt();
         break;
+      case TypeTag::TENSOR:
+        payload.as_tensor.reset();
+        break;
       // Manually list out the types so that if a type here is added later and
       // not handled the compiler can catch it.
       case TypeTag::NONE:
       case TypeTag::INT:
       case TypeTag::DOUBLE:
       case TypeTag::BOOL:
         break;
-      case TypeTag::TENSOR:
-        payload.as_tensor.reset();
-        break;
     }
   }