Fix couple LSAN detected leaks in unit and end2end tests Bug: angleproject:6937 Change-Id: Ibef9a300056509437edd50e9db18908c0b6d449e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3413271 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>