Test failure: test_qir_submission_mz_to_reg_qa

[cqc-alec]

E.g. https://github.com/CQCL/pytket-quantinuum/actions/runs/11006800226

 FAILED integration/backend_test.py::test_qir_submission_mz_to_reg_qa[H1-1SC] - assert 20 == 128
 +  where 20 = len([d[4], d[3], d[2], d[1], d[0], c[4], ...])
 +    where [d[4], d[3], d[2], d[1], d[0], c[4], ...] = get_bitlist()
 +      where get_bitlist = BackendResult(q_bits={},c_bits={d[4]: 0, d[3]: 1, d[2]: 2, d[1]: 3, d[0]: 4, c[4]: 5, c[3]: 6, c[2]: 7, c[1]: 8, c[0]:...]\n [0 0 0]\n [0 0 0]\n [0 0 0]\n [0 0 0]\n [0 0 0]\n [0 0 0]\n [0 0 0]\n [0 0 0]],state=None,unitary=None,density_matrix=None).get_bitlist