[release-branch.go1.21] net: tolerate permission errors in interface tests
On our linux-arm64 builders, we're getting permission errors despite
running as root. Detect those errors and skip the test.
Fixes #61414.
Change-Id: I5d7c45789337bee3860b19335bbb9eb884c48986
Reviewed-on: https://go-review.googlesource.com/c/go/+/510737
Auto-Submit: Heschi Kreinick <heschi@google.com>
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit
8e1ec1cb9385414a7d6b664d8ace6bc9468cc500)
Reviewed-on: https://go-review.googlesource.com/c/go/+/511136
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Bypass: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>