Only when keyword should be highlighted in WhenWithOnlyElseInspection

#KT-31673 Fixed

idea/testData/inspectionsLocal/whenWithOnlyElse/subjectVariable/blockElseUsedAsExpression/multiReference.kt

@@ -1,10 +1,10 @@
 // WITH_RUNTIME
 fun test() {
-    val x = when (val a = create()) {
+    val x = when<caret> (val a = create()) {
         else -> {
             use(a, a)
         }
-    }<caret>
+    }
 }
 
 fun create(): String = ""

idea/testData/inspectionsLocal/whenWithOnlyElse/subjectVariable/blockElseUsedAsExpression/noReference.kt

@@ -1,10 +1,10 @@
 // WITH_RUNTIME
 fun test() {
-    val x = when (val a = create()) {
+    val x = when<caret> (val a = create()) {
         else -> {
             use("")
         }
-    }<caret>
+    }
 }
 
 fun create(): String = ""

idea/testData/inspectionsLocal/whenWithOnlyElse/subjectVariable/blockElseUsedAsExpression/noReference2.kt

@@ -1,10 +1,10 @@
 // WITH_RUNTIME
 fun test() {
-    val x = when (val a = 42) {
+    val x = when<caret> (val a = 42) {
         else -> {
             use("")
         }
-    }<caret>
+    }
 }
 
 fun use(s: String) {}

idea/testData/inspectionsLocal/whenWithOnlyElse/subjectVariable/blockElseUsedAsExpression/singleReference.kt

@@ -1,10 +1,10 @@
 // WITH_RUNTIME
 fun test() {
-    val x = when (val a = create()) {
+    val x = when<caret> (val a = create()) {
         else -> {
             use(a)
         }
-    }<caret>
+    }
 }
 
 fun create(): String = ""