MoveVariableDeclarationIntoWhenInspection should move caret to subject expression

#KT-31954 Fixed

idea/testData/inspectionsLocal/moveVariableDeclarationIntoWhen/inBinaryExpression.kt.after

@@ -1,7 +1,7 @@
 fun test() = true
 
 fun foo(): Int {
-    return when (test()) {
+    return when (<caret>test()) {
         true -> 42
         else -> null
     } ?: 55

idea/testData/inspectionsLocal/moveVariableDeclarationIntoWhen/inProperty.kt.after

@@ -1,7 +1,7 @@
 fun test() = 42
 
 fun foo() {
-    val b = when (val a = test()) {
+    val b = when (val <caret>a = test()) {
         1 -> a
         else -> 24
     }

idea/testData/inspectionsLocal/moveVariableDeclarationIntoWhen/inUnaryAndProperty.kt.after

@@ -1,7 +1,7 @@
 fun test() = true
 
 fun foo() {
-    val b = !when (test()) {
+    val b = !when (<caret>test()) {
         true -> true
         else -> false
     }

idea/testData/inspectionsLocal/moveVariableDeclarationIntoWhen/simple.kt.after

@@ -1,7 +1,7 @@
 fun test() = 42
 
 fun foo() {
-    when (val a = test()) {
+    when (val <caret>a = test()) {
         1 -> a
         else -> 24
     }

idea/testData/inspectionsLocal/moveVariableDeclarationIntoWhen/withComment.kt.after

@@ -1,7 +1,7 @@
 fun foo() {
 
     // comment
-    when (1) {
+    when (<caret>1) {
         1 -> {
         }
         else -> {