[Test] Move KotlinAgainstKotlin tests under BlackBoxCodegen tests

compiler/testData/codegen/box/compileKotlinAgainstKotlin/inlineClassesOldMangling.kt

@@ -0,0 +1,31 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// !LANGUAGE: +InlineClasses
+
+// MODULE: lib
+// FILE: 1.kt
+// KOTLIN_CONFIGURATION_FLAGS: +JVM.USE_OLD_INLINE_CLASSES_MANGLING_SCHEME
+package test
+
+inline class IC(val s: String)
+
+fun ordinary(s: String, ic: IC): String = s + ic.s
+
+suspend fun suspend(s: String, ic: IC): String = s + ic.s
+
+// MODULE: main(lib)
+// FILE: 2.kt
+import kotlin.coroutines.*
+import test.*
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(Continuation(EmptyCoroutineContext) {})
+}
+
+fun box(): String {
+    var res = ordinary("O", IC("K"))
+    if (res != "OK") return "FAIL 1: $res"
+    builder {
+        res = suspend("O", IC("K"))
+    }
+    return res
+}