Disable tracegz (trace interpreter) by default, remove from CI Trace interpreter is incomplete and we've been punting on it. Can be re-enabled with angle_enable_tracegz=true in gn args. This avoids accidentally pulling trace sources into builds. Bug: b/376300037 Change-Id: Ib755fa9f57885216b02a481fd670a1bb0266f0db Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5987382 Reviewed-by: Cody Northrop <cnorthrop@google.com> Commit-Queue: Roman Lavrov <romanl@google.com>