testing/bazel4: upgrade to 4.2.0
- Ref https://github.com/bazelbuild/bazel/releases/tag/4.2.0
- patch_TEMP_FAILURE_RETRY.patch is backported by upstream as https://github.com/bazelbuild/bazel/commit/9d38cb0cdf1d389e7b54687ab5b62b48976a7ffc
Edited by Oleg Titov