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ARROW-17450: [C++][Parquet] Add support for uint8 boolean decode in addition to bool array (#14359)

Commit [466018084861f86a9171803c6d689e9c1c1efb5a](https://github.com/apache/arrow/commit/466018084861f86a9171803c6d689e9c1c1efb5a) added support for RLE boolean decoder. We refactored some additional code making it streamlined with other cases for decoder. 

However there was a downstream dependency for a Decode function which taken in an array of `uint8` instead of `bool`. To not break any existing workload, adding back support for decode boolean datatype with array of `uint8`

Lead-authored-by: sfc-gh-nthimmegowda <nishanth.thimmegowda@snowflake.com>
Co-authored-by: Antoine Pitrou <pitrou@free.fr>
Signed-off-by: Antoine Pitrou <antoine@python.org>