[IR] Supported inlining of adapted references + tests

compiler/testData/codegen/boxInline/callableReference/adaptedReferences/inlineVarargInts.kt

@@ -0,0 +1,18 @@
+// !LANGUAGE: +NewInference
+// WITH_RUNTIME
+// KJS_WITH_FULL_RUNTIME
+
+// FILE: 1.kt
+package test
+
+inline fun foo(x: (Int, Int) -> Int): Int =
+    x(120,3)
+
+inline fun bar(vararg x: Int): Int =
+    x.sum()
+
+// FILE: 2.kt
+import test.*
+
+fun box(): String =
+    if (foo(::bar) == 123) "OK" else "FAIL"