Add support for random seed in tensornet and tensornet-mps backends

[1tnguyen]

Currently, these 2 backends don't support random seed since cutensornetsamplersample is using a random default seed.

When cutensornetsamplersample allows resetting the seed to a user-defined value, we need to update the backends to support cudaq::set_random_seed.

Enable these tests once this issue is fixed (PR #863):

cuda-quantum/unittests/integration/ghz_nisq_tester.cpp

Line 97 in 6edf1cd

#ifndef CUDAQ_BACKEND_TENSORNET

[bmhowe23]

Related: https://github.com/NVIDIA/cuda-quantum/actions/runs/10104408125 failed with this error while processing docs/sphinx/examples/cpp/other/random_walk_qpe.cpp on the tensornet-mps backend:

Exited with code 134
a.out: /workspaces/cuda-quantum/runtime/nvqir/cutensornet/simulator_cutensornet.cpp:162: virtual bool nvqir::SimulatorTensorNetBase::measureQubit(std::size_t): Assertion `std::abs(1.0 - (prob0 + prob1)) < 1e-9' failed.

The docs link provided above still says the ability to reset the seed to a user-defined value may be provided in the future.

The problem in the Publishing run cannot easily be debugged without the ability to set the random seed.

CUDA-Q version used in the publishing run above: bac06f8 (main)