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ARROW-9544: [R] Fix version argument of write_parquet()

Setting the version argument in `write_parquet()` did not work due to an incorrect function name. This PR fixes the bug, adds tests and amends the documentation.

Closes #7831 from Plebejer/master

Authored-by: Matthias <matthias.gomolka@posteo.de>
Signed-off-by: Neal Richardson <neal.p.richardson@gmail.com>