Fix bad ANGLE GL tests. These tests were calling GLES functions in the destructor, which would lead to nullptr deferences. This was only caught in TSAN for some reason. Bug: angleproject:7947 Change-Id: I47dd0edba19d029757c8ddb282ca06a7e1baab45 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4157174 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Auto-Submit: Jamie Madill <jmadill@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>