[Test] Merge box against java tests into codegen black box tests

compiler/testData/codegen/boxAgainstJava/sam/differentFqNames.kt

@@ -1,4 +1,5 @@
 // WITH_RUNTIME
+// MODULE: lib
 // FILE: Custom.java
 
 class Custom {
@@ -7,6 +8,7 @@ class Custom {
     }
 }
 
+// MODULE: main(lib)
 // FILE: 1.kt
 
 fun box(): String {