[release-branch.go1.18] net: skip TestDialCancel on darwin-arm64
[release-branch.go1.18] net: skip TestDialCancel on darwin-arm64

We're turning up Macs in a network environment that clashes with this
test. I don't think it's critical to get it working, so skip it.

For #49149.
Fixes #52706.

Change-Id: I925e3ecc5356c4cefd208bdcff3d98021215d0b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/402181
Reviewed-by: Alex Rakoczy <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@golang.org>
Run-TryBot: Heschi Kreinick <e89ab2b172855aa0ad01c40c4d8a3535a61ac68a@google.com>
Auto-Submit: Heschi Kreinick <e89ab2b172855aa0ad01c40c4d8a3535a61ac68a@google.com>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
(cherry picked from commit 06b0a655a1f46abab2e3c173259ad184b557dd89)
Reviewed-on: https://go-review.googlesource.com/c/go/+/405294
Reviewed-by: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@google.com>
Run-TryBot: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>
Reviewed-by: Heschi Kreinick <e89ab2b172855aa0ad01c40c4d8a3535a61ac68a@google.com>

cloudflare/go,cloudflare/go,cloudflare/go,cloudflare/go,cloudflare/go,cloudflare/go,cloudflare/go,cloudflare/go