ARROW-9021: [Python] Add the filesystem explanation to parquet.read_table docstring
ARROW-9021: [Python] Add the filesystem explanation to parquet.read_table docstring

Use same doc string as ParquetDataset. https://arrow.apache.org/docs/python/generated/pyarrow.parquet.ParquetDataset.html.

Looks like the arg currently has no docs. https://arrow.apache.org/docs/python/generated/pyarrow.parquet.read_table.html

cc. @jorisvandenbossche our discussion here: https://github.com/pandas-dev/pandas/issues/34467#issuecomment-636366589

Closes #7332 from alimcmaster1/patch-1

Authored-by: alimcmaster1 <a2148eec118c0b3c3191ffb5158420538af83222@gmail.com>
Signed-off-by: Joris Van den Bossche <36c737f86d71d8ee1ddeb1e5c83102ee5de8f97c@gmail.com>

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