[firefighter] Replace builder name regexes with more fuzzy matching.
[firefighter] Replace builder name regexes with more fuzzy matching.

The regexes are too brittle, and break when new bots don't follow the same naming conventions. We can get most of the information we need by just looking for a few specific keywords.

Review-Url: https://codereview.chromium.org/2567563002

benschmaus/catapult,sahiljain/catapult,catapult-project/catapult-csm,sahiljain/catapult,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult-csm,sahiljain/catapult,catapult-project/catapult,sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,benschmaus/catapult,sahiljain/catapult,benschmaus/catapult,catapult-project/catapult,catapult-project/catapult-csm,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult,benschmaus/catapult,sahiljain/catapult,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult