Rollup merge of rust-lang#79444 - sasurau4:test/move-const-ip, r=matklad

Move const ip in ui test to unit test

Helps with rust-lang#76268

r? ``@matklad``

Author: m-ou-se

library/std/src/net/ip/tests.rs

@@ -936,4 +936,10 @@ fn ip_const() {
 
     const IS_MULTICAST: bool = IP_ADDRESS.is_multicast();
     assert!(!IS_MULTICAST);
+
+    const IS_IP_V4: bool = IP_ADDRESS.is_ipv4();
+    assert!(IS_IP_V4);
+
+    const IS_IP_V6: bool = IP_ADDRESS.is_ipv6();
+    assert!(!IS_IP_V6);
 }