"Remove single lambda parameter declaration": do not suggest when lambda is directly under 'if/when'

#KT-35995 Fixed

idea/testData/quickfix/removeSingleLambdaParameter/inWhen2.kt

@@ -0,0 +1,8 @@
+// "Remove single lambda parameter declaration" "true"
+fun test(i: Int) {
+    val p: (String) -> Boolean =
+        when (i) {
+            1 -> { { <caret>s -> true } }
+            else -> { s -> false }
+        }
+}