Skip TestFQDNCacheMinTTL if cluster has Windows Nodes. Fixes #6891

The TestFQDNCacheMinTTL e2e test currently does not support Windows.
We skip it if any Node in the test cluster is a Windows Node, which is also
consistent with other AntreaPolicy e2e tests.

test/e2e/antreapolicy_test.go

@@ -5303,6 +5303,12 @@ func testAntreaClusterNetworkPolicyStats(t *testing.T, data *TestData) {
 // by TestFQDNCacheMinTTL with 2 fqdnCacheMinTTL values where `0` represents a default value
 // when fqdnCacheMinTTL is unset .
 func TestFQDNCacheMinTTL(t *testing.T) {
+	skipIfAntreaPolicyDisabled(t)
+	skipIfHasWindowsNodes(t)
+	skipIfNotIPv4Cluster(t)
+	skipIfIPv6Cluster(t)
+	skipIfNotRequired(t, "mode-irrelevant")
+
 	t.Run("minTTLUnset", func(t *testing.T) { testWithFQDNCacheMinTTL(t, 0) })
 	t.Run("minTTL20s", func(t *testing.T) { testWithFQDNCacheMinTTL(t, 20) })
 }
@@ -5314,11 +5320,6 @@ func testWithFQDNCacheMinTTL(t *testing.T, fqdnCacheMinTTL int) {
 		dnsTTL   = 5
 	)
 
-	skipIfAntreaPolicyDisabled(t)
-	skipIfNotIPv4Cluster(t)
-	skipIfIPv6Cluster(t)
-	skipIfNotRequired(t, "mode-irrelevant")
-
 	data, err := setupTest(t)
 	if err != nil {
 		t.Fatalf("Error when setting up test: %v", err)