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This CL implements the basic API layer of the new results_processor,
exposing functions to create an argument parser, process options,
and finally process results.

Currently the results processor only supports the "none" output
format, still delegating all output formatting to Telemetry.

Depends on catapult CL:
https://chromium-review.googlesource.com/c/catapult/+/1718424

Bug: 928275
Change-Id: Ib65cf62eeb59a4ab515f963bfcc7cc3bbd1f13f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1692986
Commit-Queue: Juan Antonio Navarro Pérez <perezju@chromium.org>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683116}