ARROW-17360: [Python] Reorder columns in pyarrow.feather.read_table

[AlenkaF]

Before this PR:

table = pa.table({"a": [1, 2, 3], "b": ["a", "b", "c"]})
orc.write_table(table, 'example.orc')
orc.read_table('example.orc', columns=['b', 'a'])
# pyarrow.Table
# a: int64
# b: string
# ----
# a: [[1,2,3]]
# b: [["a","b","c"]]

After this PR:

table = pa.table({"a": [1, 2, 3], "b": ["a", "b", "c"]})
orc.write_table(table, 'example.orc')
orc.read_table('example.orc', columns=['b', 'a'])
# pyarrow.Table
# b: string
# a: int64
# ----
# b: [["a","b","c"]]
# a: [[1,2,3]]

[github-actions]

https://issues.apache.org/jira/browse/ARROW-17360

[jorisvandenbossche]

Thanks!

[jorisvandenbossche]

Hmm, the failures are actually related here, and I am not directly sure how to solve this .. We allow nested columns to be selected using a "dotted path", but that doesn't work for select()

[AlenkaF]

Yeah, that's unfortunate. select() with "dotted path" doesn't work for pyarrow.Table but works for ORCF.read():

>       result4 = orc_file.read(columns=["struct.middle.inner"])

opt/conda/envs/arrow/lib/python3.8/site-packages/pyarrow/tests/test_orc.py:584: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
opt/conda/envs/arrow/lib/python3.8/site-packages/pyarrow/orc.py:189: in read
    table = table.select(columns)
pyarrow/table.pxi:3053: in pyarrow.lib.Table.select
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   KeyError: 'Field "struct.middle.inner" does not exist in table schema'

Due to that the easy solution for reordering the columns isn't feasible anymore. Will close this PR and make another one, where I will add information to the docstrings that in orc.read_table() we always follow the order of the file.