[Test] Move KotlinAgainstKotlin tests under BlackBoxCodegen tests

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

@@ -0,0 +1,34 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// !LANGUAGE: +InlineClasses
+// WITH_COROUTINES
+
+// MODULE: lib
+// FILE: a.kt
+
+package a
+
+var result = ""
+
+inline class P(val value: String)
+
+suspend fun foo(p: P = P("OK")) {
+    result = p.value
+}
+
+// MODULE: main(lib)
+// FILE: b.kt
+
+import kotlin.coroutines.*
+import helpers.*
+import a.*
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(EmptyContinuation)
+}
+
+fun box(): String {
+    builder {
+        foo()
+    }
+    return result
+}