Remove codegen tests with Java, move testData to boxWithJava/

There'll be a single generated test class like
BlackBoxCodegenTestGenerated

compiler/testData/codegen/boxWithJava/functions/referencesStaticInnerClassMethod.java

@@ -0,0 +1,5 @@
+class R {
+    public static class id {
+        public static final int main = 17;
+    }
+}

compiler/testData/codegen/boxWithJava/functions/referencesStaticInnerClassMethod.kt

@@ -0,0 +1,2 @@
+fun box() =
+    if (R.id.main == 17) "OK" else "fail"

compiler/testData/codegen/boxWithJava/functions/referencesStaticInnerClassMethodL2.java

@@ -0,0 +1,7 @@
+class R {
+    public static class id {
+        public static class zzz {
+            public static final int main = 17;
+        }
+    }
+}

compiler/testData/codegen/boxWithJava/functions/referencesStaticInnerClassMethodL2.kt

@@ -0,0 +1,2 @@
+fun box() =
+    if (R.id.zzz.main == 17) "OK" else "fail"

compiler/testData/codegen/boxWithJava/functions/removeInIterator.java

@@ -0,0 +1,5 @@
+public class removeInIterator {
+    public static void bar(java.util.Iterator<Integer> it) {
+        it.remove();
+    }
+}

compiler/testData/codegen/boxWithJava/functions/removeInIterator.kt

@@ -0,0 +1,13 @@
+fun box() : String {
+    try {
+        removeInIterator.bar(object : Iterator<Int> {
+            public override fun hasNext(): Boolean = false
+            public override fun next(): Int = 1
+        })
+    }
+    catch (e: UnsupportedOperationException) {
+        if (e.getMessage() == "Mutating method called on a Kotlin Iterator")
+            return "OK"
+    }
+    return "fail"
+}