Generate method calls for inline classes through IC, not IC$Erased

IC extends IC$Erased, so it should be fine.

compiler/testData/codegen/bytecodeText/inlineClasses/toStringIsCalledByInlineClass.kt

@@ -0,0 +1,13 @@
+// !LANGUAGE: +InlineClasses
+
+// FILE: Z.kt
+inline class Z(val x: Int)
+
+// FILE: test.kt
+fun testZ(z: Z) = z.toString()
+fun testNZ(z: Z?) = z?.toString()
+
+// @TestKt.class:
+// 0 INVOKESTATIC Z\$Erased\.toString
+// 0 INVOKESTATIC Z\-Erased\.toString
+// 2 INVOKESTATIC Z\.toString \(I\)Ljava/lang/String;