[XLA:Python] Add AllGather to HLO bindings.
[XLA:Python] Add AllGather to HLO bindings.

First step in fixing https://github.com/google/jax/issues/3431

PiperOrigin-RevId: 318138763
Change-Id: Ie79e882f649ce96ea373a76f936b0a783ac2cebf

tensorflow/tensorflow-pywrap_tf_optimizer,petewarden/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,davidzchen/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow,freedomtan/tensorflow,yongtang/tensorflow,gautam1858/tensorflow,annarev/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,yongtang/tensorflow,aam-at/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,aldian/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,sarvex/tensorflow,yongtang/tensorflow,aldian/tensorflow,paolodedios/tensorflow,Intel-Corporation/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,gautam1858/tensorflow,paolodedios/tensorflow,davidzchen/tensorflow,annarev/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,cxxgtxy/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_saved_model,frreiss/tensorflow-fred,Intel-Corporation/tensorflow,aldian/tensorflow,sarvex/tensorflow,davidzchen/tensorflow,yongtang/tensorflow,paolodedios/tensorflow,davidzchen/tensorflow,paolodedios/tensorflow,gautam1858/tensorflow,frreiss/tensorflow-fred,petewarden/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,gautam1858/tensorflow,Intel-tensorflow/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_saved_model,petewarden/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-experimental_link_static_libraries_once,sarvex/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,karllessard/tensorflow,Intel-tensorflow/tensorflow,freedomtan/tensorflow,aam-at/tensorflow,aam-at/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-experimental_link_static_libraries_once,karllessard/tensorflow,tensorflow/tensorflow-pywrap_saved_model,paolodedios/tensorflow,sarvex/tensorflow,cxxgtxy/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow,petewarden/tensorflow,Intel-tensorflow/tensorflow,Intel-tensorflow/tensorflow,aam-at/tensorflow,tensorflow/tensorflow,Intel-Corporation/tensorflow,aldian/tensorflow,tensorflow/tensorflow,sarvex/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,davidzchen/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,frreiss/tensorflow-fred,annarev/tensorflow,aam-at/tensorflow,tensorflow/tensorflow,paolodedios/tensorflow,yongtang/tensorflow,davidzchen/tensorflow,paolodedios/tensorflow,freedomtan/tensorflow,davidzchen/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,sarvex/tensorflow,Intel-Corporation/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow,gautam1858/tensorflow,Intel-Corporation/tensorflow,yongtang/tensorflow,Intel-Corporation/tensorflow,karllessard/tensorflow,karllessard/tensorflow,tensorflow/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,freedomtan/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-experimental_link_static_libraries_once,petewarden/tensorflow,Intel-tensorflow/tensorflow,petewarden/tensorflow,tensorflow/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_saved_model,yongtang/tensorflow,annarev/tensorflow,freedomtan/tensorflow,yongtang/tensorflow,yongtang/tensorflow,freedomtan/tensorflow,Intel-tensorflow/tensorflow,davidzchen/tensorflow,karllessard/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-pywrap_saved_model,karllessard/tensorflow,aam-at/tensorflow,cxxgtxy/tensorflow,karllessard/tensorflow,aam-at/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,annarev/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aldian/tensorflow,frreiss/tensorflow-fred,yongtang/tensorflow,Intel-Corporation/tensorflow,aldian/tensorflow,sarvex/tensorflow,frreiss/tensorflow-fred,karllessard/tensorflow,Intel-tensorflow/tensorflow,cxxgtxy/tensorflow,paolodedios/tensorflow,aam-at/tensorflow,aam-at/tensorflow,aam-at/tensorflow,annarev/tensorflow,gautam1858/tensorflow,frreiss/tensorflow-fred,aldian/tensorflow,aldian/tensorflow,annarev/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,freedomtan/tensorflow,freedomtan/tensorflow,yongtang/tensorflow,paolodedios/tensorflow,sarvex/tensorflow,davidzchen/tensorflow,frreiss/tensorflow-fred,annarev/tensorflow,annarev/tensorflow,tensorflow/tensorflow-pywrap_saved_model,Intel-tensorflow/tensorflow,cxxgtxy/tensorflow,frreiss/tensorflow-fred,karllessard/tensorflow,petewarden/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow,frreiss/tensorflow-fred,Intel-Corporation/tensorflow