Introduce "Convert property getter to initializer" intention

#KT-13854 Fixed

idea/testData/multiModuleQuickFix/convertPropertyGetterToInitializer/header/header.kt

@@ -0,0 +1,7 @@
+// "Convert property getter to initializer" "false"
+// ERROR: Expected declaration must not have a body
+// ACTION: Convert to block body
+expect class C {
+    val p: Int
+        <caret>get() = 1
+}