[socket] Fix IPv6 compilation error on host platform (#14101)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

tests/components/socket/common.yaml

@@ -0,0 +1,11 @@
+substitutions:
+  network_enable_ipv6: "false"
+
+socket:
+
+wifi:
+  ssid: MySSID
+  password: password1
+
+network:
+  enable_ipv6: ${network_enable_ipv6}

tests/components/socket/test-ipv6.esp32-idf.yaml

@@ -0,0 +1,4 @@
+substitutions:
+  network_enable_ipv6: "true"
+
+<<: !include common.yaml

tests/components/socket/test-ipv6.host.yaml

@@ -0,0 +1,4 @@
+socket:
+
+network:
+  enable_ipv6: true

tests/components/socket/test.esp32-idf.yaml

@@ -0,0 +1 @@
+<<: !include common.yaml

tests/components/socket/test.host.yaml

@@ -0,0 +1,3 @@
+socket:
+
+network: