KT-5041 Smart completion for last argument lambda outside parenthesis

#KT-5041 Fixed

idea/idea-completion/testData/smart/functionLiterals/OutsideCallParenthesis8.kt

@@ -0,0 +1,8 @@
+fun foo(optional: Int = 0, handler: (String, Char) -> Unit){}
+
+fun bar(handler: (String, Char) -> Unit) {
+    foo <caret>
+}
+
+// EXIST: "{ String, Char -> ... }"
+// ABSENT: handler