FIR IDE: introduce KtFirConstructorDelegationReference

idea/testData/resolve/references/constructorDelegatingReference/toPrimary.kt

@@ -0,0 +1,6 @@
+class A(a: Int) {
+    constructor() : <caret>this(2)
+}
+
+// REF: (in A).A(Int)
+

idea/testData/resolve/references/constructorDelegatingReference/toSecondary.kt

@@ -0,0 +1,8 @@
+class A(a: Int) {
+    constructor(b: String) : this(2)
+
+    constructor() : <caret>this("2")
+}
+
+// REF: (in A).A(String)
+