New Features for TFLite Delegates accuracy and correctness tools
The new features are: 

- **Option to use reference and test model for the evaluation tools.** This supports the cases, where the delegate does not perform inline model compilation for target compute IP but requires model to be preprocessed in advance.  For instance the workflow with Ethos-U NPU - the model is converted by Arm Vela tool, which replaces part of the compute graph with custom nodes recognized by the particular delegate. To evaluate the accuracy in this case one needs to supply both the reference and converted (test) model. The reference to be used with reference inference and test model with delegate. 
-  **Add support for int32 input/output**