Improved error reporting for candidates with wrong parameter count

compiler/testData/diagnostics/tests/inference/completeInferenceIfManyFailed.kt

@@ -6,12 +6,11 @@ fun <T: Any> joinT(<!UNUSED_PARAMETER!>x<!>: Int, vararg <!UNUSED_PARAMETER!>a<!
     return null
 }
 
-fun <T: Any> joinT(<!UNUSED_PARAMETER!>x<!>: Any, <!UNUSED_PARAMETER!>y<!>: T): T? {
+fun <T: Any> joinT(<!UNUSED_PARAMETER!>x<!>: Comparable<*>, <!UNUSED_PARAMETER!>y<!>: T): T? {
     return null
 }
 
 fun test() {
-    val x2 = joinT(<!NON_VARARG_SPREAD!>*<!>1, "2")
+    val x2 = <!TYPE_INFERENCE_PARAMETER_CONSTRAINT_ERROR!>joinT<!>(<!TYPE_MISMATCH!>Unit<!>, "2")
     checkSubtype<String?>(x2)
-}
-
+}