Added diagnostic tests for inference and incorporation

compiler/testData/diagnostics/tests/inference/commonSystem/fixVariablesInRightOrder.kt

@@ -0,0 +1,17 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class GenericClass<out T>
+
+public fun <K, V> GenericClass<Map<K, V>>.foo() {}
+
+public fun bar<T>(t: T, ext: GenericClass<T>.() -> Unit) {}
+
+fun test() {
+    bar(mapOf(2 to 3)) { foo() }
+}
+
+// from library
+class Pair<out A, out B>
+fun <K, V> mapOf(keyValuePair: Pair<K, V>): Map<K, V> = throw Exception()
+fun <A, B> A.to(that: B): Pair<A, B> = throw Exception()
+