[uma metric] Restrict check for linear bins.
[uma metric] Restrict check for linear bins.

The check for inconsistency in the histogram bins and values applies
only for linear bins, so avoid triggering failures for exponential bins.

BUG=chromium:1139460

Change-Id: I804c63cbff978f615cce6301cb1f0f8c89e0e520
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/2485305
Reviewed-by: Deep Roy <196de8ecef43ff77ba1a773ccd52374e3849c302@chromium.org>
Commit-Queue: Sadrul Chowdhury <be235e35a6c144329e4aa1b0fbe2c3f8c71f3676@chromium.org>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult