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

compiler/testData/codegen/boxAgainstJava/ieee754/nullableAnyToReal.kt

@@ -1,3 +1,4 @@
+// MODULE: lib
 // FILE: JavaClass.java
 
 public class JavaClass {
@@ -13,6 +14,7 @@ public class JavaClass {
     }
 }
 
+// MODULE: main(lib)
 // FILE: b.kt
 
 fun box(): String {
@@ -23,4 +25,4 @@ fun box(): String {
     if ((jClass.minus0() as Double) != (jClass.plus0() as Double)) return "fail 5"
 
     return "OK"
-}
+}