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

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

@@ -1,3 +1,4 @@
+// MODULE: lib
 // FILE: JavaClass.java
 
 public class JavaClass<T> {
@@ -24,6 +25,7 @@ public class JavaClass<T> {
 
 }
 
+// MODULE: main(lib)
 // FILE: b.kt
 
 fun box(): String {
@@ -33,4 +35,4 @@ fun box(): String {
     if (jClass.minus0() != jClass.plus0()) return "fail 5"
 
     return "OK"
-}
+}