[BUG] nested column names of a cuDF dataframe created by read_orc are not printed

[vuule]

The names are not present when printing the cuDF dataframe, even though the names are in the read_orc output. Moreover, the names are present when the dataframe is cast to pandas.

Using the input from #8910:

def test_orc_names(datadir):
    path = "struct_orc.log"
    gdf = cudf.read_orc(path)
    pdf = pd.read_orc(path)

    print(gdf)
    print(gdf.to_pandas())

             a            b                    s1                          s2
0    326215455    964670395   {'0': 2056831253.0}  {'0': {'0': 1140062029.0}}
1    326215455  -1123177776   {'0': 1735783038.0}                        None
2    326215455         <NA>   {'0': -335532064.0}  {'0': {'0': 1998862860.0}}
3    326215455   -656685553  {'0': -1463792165.0}                 {'0': None}
4    326215455  -1943088595   {'0': 1762505979.0}  {'0': {'0': -521321651.0}}
..         ...          ...                   ...                         ...
995  289956431   1954977719  {'0': -1219859255.0}  {'0': {'0': 2013006809.0}}
996  289956431  -1028878225   {'0': 1139661239.0}   {'0': {'0': 908256279.0}}
997  289956431   1827136073    {'0': 871691692.0}                        None
998  289956431   2147483647    {'0': 720591207.0}  {'0': {'0': 1773585916.0}}
999  289956431   -122306082                  None  {'0': {'0': 1801980339.0}}
[1000 rows x 4 columns]
               a  ...                             s2
0    326215455.0  ...  {'sa': {'ssa': 1140062029.0}}
1    326215455.0  ...                           None
2    326215455.0  ...  {'sa': {'ssa': 1998862860.0}}
3    326215455.0  ...                   {'sa': None}
4    326215455.0  ...  {'sa': {'ssa': -521321651.0}}
..           ...  ...                            ...
995  289956431.0  ...  {'sa': {'ssa': 2013006809.0}}
996  289956431.0  ...   {'sa': {'ssa': 908256279.0}}
997  289956431.0  ...                           None
998  289956431.0  ...  {'sa': {'ssa': 1773585916.0}}
999  289956431.0  ...  {'sa': {'ssa': 1801980339.0}}

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[github-actions]

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