net: avoid darwin_arm64 bug in TestDialParallelSpuriousConnection
On darwin_arm64, reading from a socket at the same time as the other
end is closing it will occasionally hang for 60 seconds before
returning ECONNRESET. (This is a macOS issue, not a Go issue.)
Work around this condition by adding a brief sleep before the read.
Fixes #37795.
Change-Id: I63f92b91fb297cd66f89cdab707583afd50ab9c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/411155
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Damien Neil <dneil@google.com>