[numpy] Fix users of NumPy APIs that are removed in NumPy 2.0.

This change migrates users of APIs removed in NumPy 2.0 to their recommended replacements (https://numpy.org/devdocs/numpy_2_0_migration_guide.html).

PiperOrigin-RevId: 655999944

Author: hawkinsp

tensorflow_privacy/privacy/fast_gradient_clipping/common_test_utils.py

@@ -359,7 +359,7 @@ def make_weighted_bow_model(
   feature_shape = input_dims + output_dims
   feature_weights = tf.expand_dims(
       tf.reshape(
-          tf.range(np.product(feature_shape), dtype=tf.float32),
+          tf.range(np.prod(feature_shape), dtype=tf.float32),
           feature_shape,
       ),
       axis=0,