fix wire tests assuming the instance should be different

Author: jimczi

x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/chunking/NoneChunkingSettingsTests.java

@@ -23,6 +23,11 @@ protected NoneChunkingSettings createTestInstance() {
         return NoneChunkingSettings.INSTANCE;
     }
 
+    @Override
+    protected boolean shouldBeSame(NoneChunkingSettings newInstance) {
+        return true;
+    }
+
     @Override
     protected NoneChunkingSettings mutateInstance(NoneChunkingSettings instance) throws IOException {
         return null;