KT-28405 Fix toString for inline classes with underlying arrays

compiler/testData/codegen/box/inlineClasses/kt28405.kt

@@ -0,0 +1,23 @@
+// !LANGUAGE: +InlineClasses
+// WITH_RUNTIME
+// IGNORE_BACKEND: JVM_IR, JS_IR
+
+import kotlin.test.*
+
+inline class TestUIntArrayW(val x: UIntArray)
+
+inline class InlineCharArray(val x: CharArray) {
+    override fun toString(): String = x.contentToString()
+}
+
+inline class TestInlineCharArrayW(val x: InlineCharArray)
+
+fun box(): String {
+    val t1 = TestUIntArrayW(UIntArray(1)).toString()
+    if (!t1.startsWith("TestUIntArrayW")) throw AssertionError(t1)
+
+    val t2 = TestInlineCharArrayW(InlineCharArray(charArrayOf('a'))).toString()
+    if (!t2.startsWith("TestInlineCharArrayW")) throw AssertionError(t2)
+
+    return "OK"
+}