GHSA-FCWC-P4FC-C5CC Null pointer dereference in `MatrixDiagPartOp`

Impact If a user does not provide a valid padding value to tf.rawops.MatrixDiagPartOp, then the code triggers a null pointer dereference if input is empty or produces invalid behavior, ignoring all values after the first: python import tensorflow as tf tf.rawops.MatrixDiagPartV2...