Smart completion: support for overloaded method calls

idea/testData/completion/smart/OverloadedMethodCallArgument2.kt

@@ -0,0 +1,23 @@
+val s = ""
+val i = 123
+
+fun f(p1: Any, p2: String, p3: Int, p4: Char) {
+    foo(<caret>abc)
+}
+
+fun foo(p1: String, p2: Any) {
+}
+
+fun foo(p1: Int) {
+}
+
+// add this signature so that call above is not resolved
+fun foo(p1: Char) {
+}
+
+// ABSENT: p1
+// EXIST: p2
+// EXIST: p3
+// EXIST: p4
+// EXIST: s
+// EXIST: i