Increase bazel test timeout to 8 minutes (#40263)
Summary:
Intermittently `integration_test` hits default 5 min timeout
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40263
Differential Revision: D22131334
Pulled By: malfet
fbshipit-source-id: 128d3b6882ac5c1b60229a8e0cd2752b817191b5
