Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

compiler/testData/codegen/box/callableReference/property/simpleMutableExtension.kt

@@ -0,0 +1,18 @@
+var storage = 0
+
+var Int.foo: Int
+    get() {
+        return this + storage
+    }
+    set(value) {
+        storage = this + value
+    }
+
+fun box(): String {
+    val pr = Int::foo
+    if (pr.get(42) != 42) return "Fail 1: ${pr.get(42)}"
+    pr.set(200, 39)
+    if (pr.get(-239) != 0) return "Fail 2: ${pr.get(-239)}"
+    if (storage != 239) return "Fail 3: $storage"
+    return "OK"
+}