Implement intentions to add/remove braces to/from when entries #KT-12043 Fixed

idea/testData/intentions/removeBracesFromWhenEntry/lambda.kt

@@ -0,0 +1,9 @@
+// IS_APPLICABLE: false
+
+fun foo() {
+    when (1) {
+        else -> {
+            <caret>it: Int -> it.hashCode()
+        }
+    }
+}