KT-5041 Smart completion for last argument lambda outside parenthesis

#KT-5041 Fixed

idea/idea-completion/testData/smart/functionLiterals/OutsideCallParenthesisAndVararg2.kt

@@ -0,0 +1,8 @@
+fun foo(vararg args: Int, handler: (String, Char) -> Unit){}
+
+fun bar(handler: (String, Char) -> Unit) {
+    foo(1, 2) <caret>
+}
+
+// EXIST: "{ String, Char -> ... }"
+// ABSENT: handler