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ARROW-6318: [Integration] Run tests against pregenerated files

- Updates testing module to point to latest master which contains files
- Refactors integration tests:
  - Move skips to use the build in skip functionality
  - generalize compare_implementation to a take a function to run tests

We could potentially provide more metadata as part of the checked in files, as this change relies a little too much on file name convention, but it does the jobs.

Closes #5272 from emkornfield/gold_integration_tests and squashes the following commits:

3c7d6f794 <Micah Kornfield> add skip param for interval
7a5a5d563 <Micah Kornfield> remove unused parameter
eb8ff11a9 <Micah Kornfield> ARROW-6318:  Run tests against pregenerated files

Authored-by: Micah Kornfield <emkornfield@gmail.com>
Signed-off-by: Wes McKinney <wesm+git@apache.org>