backend/tests: Add blackbox tests from Kotlin JVM

Added tests from testData/codegen/box directory. There are blackbox tests
in other directories and they are to be added.

backend.native/tests/external/codegen/blackbox/reflection/properties/javaStaticField.kt

@@ -0,0 +1,36 @@
+// TODO: muted automatically, investigate should it be ran for JS or not
+// IGNORE_BACKEND: JS
+
+// WITH_REFLECT
+// FILE: J.java
+
+public class J {
+    public static String x;
+
+    static String packageLocalField;
+}
+
+// FILE: K.kt
+
+import kotlin.test.assertEquals
+
+fun box(): String {
+    val f = J::x
+    assertEquals("x", f.name)
+
+    assertEquals(f, J::class.members.single { it.name == "x" })
+
+    f.set("OK")
+    assertEquals("OK", J.x)
+    assertEquals("OK", f.getter())
+
+    val pl = J::packageLocalField.getter
+    try {
+        pl()
+        return "Fail: package local field must be inaccessible"
+    } catch (e: Exception) {
+        // OK
+    }
+
+    return f.get()
+}