Batch-compile and batch-run-replay multiple tests Multiple tests are batch-compiled into 1 replay application instead of multiple replay applications. Replay application now runs generated code of multiple tests instead of 1 test. This reduces overhead cost and brings down runtime. Main process now receives messages sent by workers via a message queue and prints them to the main stdout so that user can know if workers are hanging. Add handle for user interrupt (Ctrl-C) so that processes are properly destroyed and cleaned up. Trace files now have the option not to be deleted. Bug: angleproject:4817 Change-Id: Ic90ae0f430e1d3c261ffea5f963be5a4e94b0ad2 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2310909 Reviewed-by: Cody Northrop <cnorthrop@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Manh Nguyen <nguyenmh@google.com>