Revert^3 Build only the needed run-test shards with "test.py -b -t XXX"

This reverts commit caff8ed242fdce1b278dc01c310d16ada80ed6cb.

Reason for revert: Breaks art-debug-gc

Change-Id: I29078b1b8ef38c30580af2488df7014311f539d8
7 files changed