Flaky HNF test in matrix_integer_dense_hnf.py

[orlitzky]

Looks like #33751 again?

sage-runtests --warn-long 5.0 --random-seed=136720810844292019216337175767903652208 src/sage/matrix/matrix_integer_dense_hnf.py
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Error: Failed example:: Exception raised:
Traceback (most recent call last):
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 733, in _run
    self.compile_and_execute(example, compiler, test.globs)
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 1157, in compile_and_execute
    exec(compiled, globs)
  File "<doctest sage.matrix.matrix_integer_dense_hnf.benchmark_hnf[1]>", line 1, in <module>
    hnf.benchmark_hnf([Integer(10),Integer(25)],Integer(32))
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/matrix/matrix_integer_dense_hnf.py", line 1178, in benchmark_hnf
    h, _ = hnf(a, proof=False)
           ^^^^^^^^^^^^^^^^^^^
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/matrix/matrix_integer_dense_hnf.py", line 1078, in hnf
    H, pivots = probable_hnf(A, include_zero_rows=include_zero_rows,
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/matrix/matrix_integer_dense_hnf.py", line 906, in probable_hnf
    H = hnf_square(C, proof=proof)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/matrix/matrix_integer_dense_hnf.py", line 554, in hnf_square
    raise ValueError("A must be square.")
ValueError: A must be square.

    hnf.benchmark_hnf([10,25],32)
Exception raised:
    Traceback (most recent call last):
      File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 733, in _run
        self.compile_and_execute(example, compiler, test.globs)
      File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 1157, in compile_and_execute
        exec(compiled, globs)
      File "<doctest sage.matrix.matrix_integer_dense_hnf.benchmark_hnf[1]>", line 1, in <module>
        hnf.benchmark_hnf([Integer(10),Integer(25)],Integer(32))
      File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/matrix/matrix_integer_dense_hnf.py", line 1178, in benchmark_hnf
        h, _ = hnf(a, proof=False)
               ^^^^^^^^^^^^^^^^^^^
      File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/matrix/matrix_integer_dense_hnf.py", line 1078, in hnf
        H, pivots = probable_hnf(A, include_zero_rows=include_zero_rows,
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/matrix/matrix_integer_dense_hnf.py", line 906, in probable_hnf
        H = hnf_square(C, proof=proof)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/matrix/matrix_integer_dense_hnf.py", line 554, in hnf_square
        raise ValueError("A must be square.")
    ValueError: A must be square.