[Test] Move KotlinAgainstKotlin tests under BlackBoxCodegen tests

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

@@ -0,0 +1,20 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// TARGET_BACKEND: JVM
+// MODULE: lib
+// FILE: A.kt
+
+@file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+@file:JvmPackageName("bar")
+
+fun f() = "OK"
+
+var v: Int = 1
+
+// MODULE: main(lib)
+// FILE: B.kt
+
+fun box(): String {
+    v = 2
+    if (v != 2) return "Fail"
+    return f()
+}