The TV job failures hit so far seems to be both due to the per-testfile timeout being reached before all tasks in this test file got a chance to run, and in both cases it was hit in chaos mode and on macOS build. This patch adds a requestLongerTimeout call to increase the per-testfile timeout, which should give the test file enough time for passing the TV job even when in macOS builds and chaos mode it may be taking slighly longer. Differential Revision: https://phabricator.services.mozilla.com/D231423