JVM IR: fix generation of generic multi-file delegates

compiler/testData/codegen/box/multifileClasses/genericProperty.kt

@@ -0,0 +1,17 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: A.kt
+
+@file:kotlin.jvm.JvmMultifileClass
+@file:kotlin.jvm.JvmName("A")
+
+package test
+
+public val <T> Array<out T>.foo: String
+    get() = this[0].toString() + this[1].toString()
+
+// FILE: B.kt
+
+import test.foo
+
+fun box(): String = arrayOf('O', "K").foo