IVGCVSW-7126 Update Arm NN to Tensorflow 2.10

* Modify get_tensorflow.sh to point to the 2.10 Tensorflow tag.
* Modify FindTfLite.cmake to handle the break up of libruy.a
* Modify armnn_delegate.cpp to add registration_external field.
* Prevent the serializer/deserializer from using a system installed
  version of flatc.

Signed-off-by: Colm Donelan <colm.donelan@arm.com>
Change-Id: I688f33f387924ba29bf400f60e56f73b2329fdc1
diff --git a/delegate/src/armnn_delegate.cpp b/delegate/src/armnn_delegate.cpp
index 21c66fe..4e99335 100644
--- a/delegate/src/armnn_delegate.cpp
+++ b/delegate/src/armnn_delegate.cpp
@@ -119,6 +119,7 @@
         .builtin_code = kTfLiteBuiltinDelegate,
         .custom_name = "TfLiteArmNnDelegate",
         .version = 1,
+        .registration_external = nullptr,
     };
 
     const TfLiteStatus status =