glbench: COIL: Replace blacklist with disabled_tests

Better word for what this actually is.

BUG=none
TEST=CQ

Change-Id: I72d44e5c613b61961d0ca2702a6b62f8528e748d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/glbench/+/2604788
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Auto-Submit: Nicolas Boichat <drinkcat@chromium.org>
Commit-Queue: Ilja H. Friedel <ihf@chromium.org>
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>