Use the os.ReadFile implementation to handle
sysfs files not reporting size properly via stat.
Fixes #53761
Change-Id: I6f34515e8a211e3659f4f6c3598fae7ec0c86975
Reviewed-on: https://go-review.googlesource.com/c/go/+/416775
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Rob Pike <r@golang.org> Reviewed-by: hopehook <hopehook@golangcn.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>