Add nested function nodes checking logic for QAT validator.
Add nested function nodes checking logic for QAT validator.

PiperOrigin-RevId: 355533750
Change-Id: I7ba1acd1aff164684bcf87e1a80244f475fcb0eb

paolodedios/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,tensorflow/tensorflow-pywrap_saved_model,petewarden/tensorflow,yongtang/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,sarvex/tensorflow,tensorflow/tensorflow-pywrap_saved_model,gautam1858/tensorflow,Intel-tensorflow/tensorflow,petewarden/tensorflow,paolodedios/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,petewarden/tensorflow,paolodedios/tensorflow,yongtang/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,Intel-Corporation/tensorflow,annarev/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_saved_model,Intel-tensorflow/tensorflow,Intel-tensorflow/tensorflow,Intel-Corporation/tensorflow,frreiss/tensorflow-fred,karllessard/tensorflow,sarvex/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,frreiss/tensorflow-fred,tensorflow/tensorflow,sarvex/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,Intel-tensorflow/tensorflow,frreiss/tensorflow-fred,karllessard/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,frreiss/tensorflow-fred,sarvex/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,petewarden/tensorflow,gautam1858/tensorflow,paolodedios/tensorflow,Intel-tensorflow/tensorflow,Intel-tensorflow/tensorflow,Intel-Corporation/tensorflow,Intel-tensorflow/tensorflow,yongtang/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow,paolodedios/tensorflow,sarvex/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_saved_model,paolodedios/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,annarev/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,yongtang/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,gautam1858/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,karllessard/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,Intel-Corporation/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,frreiss/tensorflow-fred,yongtang/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow,karllessard/tensorflow,petewarden/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-experimental_link_static_libraries_once,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-experimental_link_static_libraries_once,frreiss/tensorflow-fred,karllessard/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,petewarden/tensorflow,yongtang/tensorflow,paolodedios/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,Intel-tensorflow/tensorflow,yongtang/tensorflow,frreiss/tensorflow-fred,annarev/tensorflow,tensorflow/tensorflow,sarvex/tensorflow,sarvex/tensorflow,yongtang/tensorflow,petewarden/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-pywrap_saved_model,paolodedios/tensorflow,annarev/tensorflow,frreiss/tensorflow-fred,gautam1858/tensorflow,tensorflow/tensorflow,gautam1858/tensorflow,yongtang/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,petewarden/tensorflow,frreiss/tensorflow-fred,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,paolodedios/tensorflow,yongtang/tensorflow,tensorflow/tensorflow,sarvex/tensorflow,annarev/tensorflow,Intel-Corporation/tensorflow,annarev/tensorflow