Can be constructor property: comment saver introduced to retain comments; unbound comments now added before, not after

(cherry picked from commit 886cf21)

idea/testData/quickfix/canBePrimaryConstructorProperty/commentAfter.kt

@@ -0,0 +1,4 @@
+// "Move to constructor" "true"
+class Complex(x: Int, y: Double, z: String) {
+    val <caret>y: Double = y // Duplicating
+}

idea/testData/quickfix/canBePrimaryConstructorProperty/commentAfter.kt.after

@@ -0,0 +1,4 @@
+// "Move to constructor" "true"
+class Complex(x: Int, // Duplicating
+              val y: Double, z: String) {
+}

idea/testData/quickfix/canBePrimaryConstructorProperty/commentAhead.kt

@@ -0,0 +1,7 @@
+// "Move to constructor" "true"
+class Complex(x: Int, y: Double, z: String) {
+    /**
+     * Very complex field x
+     */
+    val <caret>x = x
+}

idea/testData/quickfix/canBePrimaryConstructorProperty/commentAhead.kt.after

@@ -0,0 +1,7 @@
+// "Move to constructor" "true"
+class Complex(
+        /**
+         * Very complex field x
+         */
+        val x: Int, y: Double, z: String) {
+}