fix tests by adding missing 'init' keywords to testdata

idea/testData/refactoring/extractFunction/initializers/classes/classInitializer.kt

@@ -1,7 +1,7 @@
 // PARAM_TYPES: kotlin.Int
 // PARAM_DESCRIPTOR: value-parameter val b: kotlin.Int defined in A.<init>
 class A(val a: Int, b: Int) {
-    {
+    init {
         println(<selection>a + b</selection> - 1)
     }
 }

idea/testData/refactoring/extractFunction/initializers/classes/classInitializer.kt.after

@@ -1,7 +1,7 @@
 // PARAM_TYPES: kotlin.Int
 // PARAM_DESCRIPTOR: value-parameter val b: kotlin.Int defined in A.<init>
 class A(val a: Int, b: Int) {
-    {
+    init {
         println(i(b) - 1)
     }
 

idea/testData/refactoring/extractFunction/initializers/classes/classInitializerWithLambda.kt

@@ -1,7 +1,7 @@
 // PARAM_TYPES: kotlin.Int
 // PARAM_DESCRIPTOR: value-parameter val b: kotlin.Int defined in A.<init>
 class A(val a: Int, b: Int) {
-    {
+    init {
         println({ <selection>a + b</selection> - 1 }.invoke())
     }
 }

idea/testData/refactoring/extractFunction/initializers/classes/classInitializerWithLambda.kt.after

@@ -1,7 +1,7 @@
 // PARAM_TYPES: kotlin.Int
 // PARAM_DESCRIPTOR: value-parameter val b: kotlin.Int defined in A.<init>
 class A(val a: Int, b: Int) {
-    {
+    init {
         println({ i(b) - 1 }.invoke())
     }