Introduce Property: Forbid lazy properties/properties with initializers in traits

idea/testData/refactoring/introduceProperty/extractLazyToTrait.kt

@@ -0,0 +1,6 @@
+// EXTRACTION_TARGET: lazy property
+
+trait T {
+    fun foo(): Int = <selection>1</selection>
+}
+

idea/testData/refactoring/introduceProperty/extractLazyToTrait.kt.conflicts

@@ -0,0 +1 @@
+Can't generate lazy property: 1

idea/testData/refactoring/introduceProperty/extractWithGetterToTrait.kt

@@ -0,0 +1,7 @@
+// EXTRACTION_TARGET: property with getter
+trait T {
+    fun foo(): Int {
+        return <selection>1</selection>
+    }
+}
+

idea/testData/refactoring/introduceProperty/extractWithGetterToTrait.kt.after

@@ -0,0 +1,12 @@
+// EXTRACTION_TARGET: property with getter
+trait T {
+    private val i: Int
+        get() {
+            return 1
+        }
+
+    fun foo(): Int {
+        return i
+    }
+}
+

idea/testData/refactoring/introduceProperty/extractWithInitializerToTrait.kt

@@ -0,0 +1,6 @@
+// EXTRACTION_TARGET: property with initializer
+
+trait T {
+    fun foo(): Int = <selection>1</selection>
+}
+

idea/testData/refactoring/introduceProperty/extractWithInitializerToTrait.kt.conflicts

@@ -0,0 +1 @@
+Can't generate property with initializer: 1