This change updates the random number generation utility to use tf.uint64 for bitwise operations and constants. The seed generation function (next_seed_fn) has been rewritten to implement a proper 7-bit LFSR (PRBS7) using bitwise operations, replacing the previous power-based approximation.

This change updates the random number generation utility to use tf.uint64 for bitwise operations and constants. The seed generation function (next_seed_fn) has been rewritten to implement a proper 7-bit LFSR (PRBS7) using bitwise operations, replacing the previous power-based approximation. #1961