BUG: fid_as_index=True doesn't set fid as index read_dataframe with use_arrow=True

[theroggy]

Script to reproduce:

import pyogrio

url = "https://github.com/geofileops/geofileops/raw/main/tests/data/polygon-parcel.gpkg"
for use_arrow in [True, False]:
    gdf = pyogrio.read_dataframe(url, use_arrow=use_arrow, fid_as_index=True)
    print(f"\nuse_arrow={use_arrow}, gdf.index:\n{gdf.index}")

relevant output:

use_arrow=True, gdf.index:
RangeIndex(start=0, stop=46, step=1)

use_arrow=False, gdf.index:
Index([ 1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
       19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
       37, 38, 39, 40, 41, 42, 43, 44, 45, 46],
      dtype='int64', name='fid')
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