extracted 'getResultingCall' method

rewrote 'getResultingType' in terms of it

compiler/testData/diagnostics/tests/inference/nestedCalls/inferenceForNestedBinaryCall.kt

@@ -0,0 +1,10 @@
+package aaa
+
+fun <T> T.foo(t: T) = t
+
+fun id<T>(t: T) = t
+
+fun a() {
+    val i = id(2 foo 3)
+    i : Int // i shouldn't be resolved to error element
+}