build_plan: Create struct for CheckBuilder args.

Use a struct to wraps all the args for CheckBuilders as the args list
was getting long.

BUG=chromium:1094321
TEST=./run_tests.sh

Cq-Depend: chromium:2297800
Change-Id: Idfc740de28d7884cf4fdc2f20a14475f8b47ac7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/go/+/2388989
Tested-by: Navil Perez <navil@google.com>
Commit-Queue: Navil Perez <navil@google.com>
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: David Burger <dburger@chromium.org>
3 files changed