Call method references search in UnusedSymbolInspection.hasReferences to fix secondary constructor search

Makes #KT-12500 Fixed
Makes #KT-12501 Fixed

idea/testData/quickfix/removeUnused/secondaryConstructorFromJavaDelegate.before.Dependency.java

@@ -0,0 +1,5 @@
+class RandomJavaClass extends Ctor {
+    RandomJavaClass() {
+        super(42);
+    }
+}