[Autotest] Measure autoserv run time end to end with graphite

Add a whitelist in global config to store a white list of test with run time
measurement enabled. Autoserv uses the white list to filter tests need to
have run time measured.

BUG=chromium:237811
TEST=tested with autoserv in local machine
DEPLOY=none

Change-Id: I6340f5984d47143f648aa8907e4941856a89dbbd
Reviewed-on: https://gerrit.chromium.org/gerrit/57807
Tested-by: Dan Shi <[email protected]>
Commit-Queue: Dan Shi <[email protected]>
Reviewed-by: Dan Shi <[email protected]>
5 files changed