[NI] Map vararg to Array if it's resolved against type variable

While this behavior is questionable, it's consistent with OI and can
 be changed in future

 #KT-36201 Fixed

compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.kt

@@ -0,0 +1,17 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+fun foo(vararg ints: Int) {}
+fun test(i: IntArray) {
+    myLet(i, ::foo)
+    myLet(::foo)
+    myLet<Int>(<!TYPE_MISMATCH!>::foo<!>)
+    myLet<IntArray>(::foo)
+    myLetExplicit1(::foo)
+    myLetExplicit2(::foo)
+}
+
+fun <T> myLet(t: T, block: (T) -> Unit) {}
+fun <T> myLet(block: (T) -> Unit) {}
+fun myLetExplicit1(block: (Int) -> Unit) {}
+fun myLetExplicit2(block: (IntArray) -> Unit) {}