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ARROW-6559: [Developer][C++] Add option to pass ARROW_PACKAGE_PREFIX when using 'archery benchmark'

I also refactored a bit for less duplication of click options

Closes #5383 from wesm/ARROW-6559 and squashes the following commits:

95e10bcfb <Wes McKinney> Add option to pass ARROW_PACKAGE_PREFIX when using 'archery benchmark'

Authored-by: Wes McKinney <wesm+git@apache.org>
Signed-off-by: Wes McKinney <wesm+git@apache.org>