Run end2end tests single process on Linux Intel Multi-process suspected for flaky WebGPU backend test failures. Bug: angleproject:408276172 Change-Id: I2813d49f1263eeefea7db6999b5452d4cf61db92 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6432449 Auto-Submit: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Roman Lavrov <romanl@google.com> Commit-Queue: Roman Lavrov <romanl@google.com> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>