Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

compiler/testData/codegen/box/lazyCodegen/safeAssignComplex.kt

@@ -0,0 +1,34 @@
+var holder = ""
+
+var mainShape: Shape? = null
+
+fun getShape(): Shape? {
+    holder += "getShape1()"
+    mainShape = Shape("fail")
+    return mainShape
+}
+
+fun getOK(): String {
+    holder += "->OK"
+    return "OK"
+}
+
+
+class Shape(var result: String) {
+
+    var innerShape: Shape? = null
+
+    fun getShape2(): Shape? {
+        holder += "->getShape2()"
+        innerShape = Shape(result)
+        return innerShape
+    }
+}
+
+fun box(): String {
+    getShape()?.getShape2()?.result = getOK();
+
+    if (holder != "getShape1()->getShape2()->OK") return "fail $holder"
+
+    return mainShape!!.innerShape!!.result
+}