Expose linear_operator_addition.add_operators in the JAX/Numpy backends.

PiperOrigin-RevId: 476233072

Author: srvasude

tensorflow_probability/python/internal/backend/numpy/linalg.py

@@ -33,6 +33,7 @@
   from tensorflow_probability.python.internal.backend.numpy.gen import solve_registrations as _solve_registrations
 
   from tensorflow_probability.python.internal.backend.numpy.gen.linear_operator import *
+  from tensorflow_probability.python.internal.backend.numpy.gen.linear_operator_addition import *
   from tensorflow_probability.python.internal.backend.numpy.gen.linear_operator_block_diag import *
   from tensorflow_probability.python.internal.backend.numpy.gen.linear_operator_block_lower_triangular import *
   from tensorflow_probability.python.internal.backend.numpy.gen.linear_operator_circulant import *