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

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

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

@@ -0,0 +1,6 @@
+class RandomJavaClass {
+    public void context() {
+        Ctor c = new Ctor(0);
+        c.justCompare();
+    }
+}

idea/testData/quickfix/removeUnused/secondaryConstructorFromJava.before.Main.kt

@@ -0,0 +1,11 @@
+// "Safe delete constructor" "false"
+// ACTION: Convert to primary constructor
+// ACTION: Make internal
+// ACTION: Make private
+// ACTION: Make protected
+
+class Ctor {
+    <caret>constructor(p: Int)
+
+    fun justCompare() {}
+}

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

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

idea/testData/quickfix/removeUnused/secondaryConstructorFromJavaDelegate.before.Main.kt

@@ -0,0 +1,9 @@
+// "Safe delete constructor" "false"
+// ACTION: Convert to primary constructor
+// ACTION: Make internal
+// ACTION: Make private
+// ACTION: Make protected
+
+open class Ctor {
+    <caret>constructor(p: Int)
+}

idea/testData/quickfix/removeUnused/unusedDelegatedConstructor.kt

@@ -0,0 +1,11 @@
+// "Safe delete constructor" "false"
+// ACTION: Convert to primary constructor
+// ACTION: Make internal
+// ACTION: Make private
+// ACTION: Make protected
+
+class CtorUsedByOtherCtor {
+    <caret>constructor()
+
+    constructor(p: String): this()
+}

idea/testData/quickfix/removeUnused/unusedDelegatedConstructorSuper.kt

@@ -0,0 +1,13 @@
+// "Safe delete constructor" "false"
+// ACTION: Convert to primary constructor
+// ACTION: Make internal
+// ACTION: Make private
+// ACTION: Make protected
+
+open class CtorUsedParent {
+    <caret>constructor()
+}
+
+class CtorUsedChild : CtorUsedParent {
+    constructor() : super()
+}