[release-branch.go1.18] net: disable TestLookupDotsWithRemoteSource and TestLookupGoogleSRV

These tests fail consistently due to a DNS change causing widespread
trybot outages.

For #56707.
Fixes #56709.

Change-Id: Iebdf91254a922a48880021198f0f12f6bc16b6e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/449640
Reviewed-by: Carlos Amedee <[email protected]>
Reviewed-by: Bryan Mills <[email protected]>
Run-TryBot: Michael Knyszek <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Damien Neil <[email protected]>
(cherry picked from commit 9776524)
Reviewed-on: https://go-review.googlesource.com/c/go/+/449505
Reviewed-by: Ian Lance Taylor <[email protected]>

Author: mknyszek

src/net/lookup_test.go

@@ -71,6 +71,10 @@ var lookupGoogleSRVTests = []struct {
 var backoffDuration = [...]time.Duration{time.Second, 5 * time.Second, 30 * time.Second}
 
 func TestLookupGoogleSRV(t *testing.T) {
+	// TODO(mknyszek): Figure out next steps for this test. This is just
+	// a quick fix.
+	t.Skip("fails consistently due to an upstream DNS change; see #56707.")
+
 	t.Parallel()
 	mustHaveExternalNetwork(t)
 
@@ -631,6 +635,10 @@ func TestLookupDotsWithLocalSource(t *testing.T) {
 }
 
 func TestLookupDotsWithRemoteSource(t *testing.T) {
+	// TODO(mknyszek): Figure out next steps for this test. This is just
+	// a quick fix.
+	t.Skip("fails consistently due to an upstream DNS change; see #56707.")
+
 	if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
 		testenv.SkipFlaky(t, 27992)
 	}