Forwarded request #1152767 from bnavigator

- Update to 1.7.3
## Enhancements:
* qu.randn: support dist="rademacher".
* support dist and other randn options in various TN builders.
## Bug fixes:
* restore fallback (to scipy.linalg.svd with driver='gesvd')
behavior for truncated SVD with numpy backend.
- Release 1.7.2
## Bug fixes:
* removed import of deprecated numba.generated_jit decorator.
## Enhancements:
* add normalized=True option to tensor_network_distance for
computing the normalized distance between tensor networks,
which is useful for convergence checks.
Tensor.distance_normalized and
TensorNetwork.distance_normalized added as aliases.
* add TensorNetwork.cut_bond for cutting a bond index
- Release v1.7.1
## Enhancements:
* add TensorNetwork.visualize_tensors for visualizing the actual
data entries of an entire tensor network.
* add ham.build_mpo_propagator_trotterized for building a
trotterized propagator from a local 1D hamiltonian. This also
includes updates for creating 'empty' tensor networks using
TensorNetwork.new, and building up gates from empty tensor
networks using TensorNetwork.gate_inds_with_tn.
* add more options to Tensor.expand_ind and Tensor.new_ind:
repeat tiling mode and random padding mode.
* tensor decomposition: make eigh_truncated backend agnostic.
* tensor_compress_bond: add reduced="left" and reduced="right"