Add ir interpreter tests

compiler/testData/ir/interpreter/defaultToString.kt

@@ -0,0 +1,39 @@
+@CompileTimeCalculation
+open class A
+
+class B @CompileTimeCalculation constructor() {
+    @CompileTimeCalculation
+    override fun toString(): String {
+        return super.toString()
+    }
+}
+
+class C
+
+class D : A()
+
+@CompileTimeCalculation
+fun checkToStringCorrectness(value: Any, startStr: String): Boolean {
+    val string = value.toString()
+    return string.subSequence(0, startStr.length) == startStr && string.get(startStr.length) == '@' && string.length <= startStr.length + 9
+}
+
+@CompileTimeCalculation
+fun getTheSameValue(a: Any): Any = a
+
+@CompileTimeCalculation
+fun theSameObjectToString(value: Any): Boolean {
+    return value.toString() == getTheSameValue(value).toString()
+}
+
+const val aString = <!EVALUATED: `true`!>checkToStringCorrectness(A(), "A")<!>
+const val bString = <!EVALUATED: `true`!>checkToStringCorrectness(B(), "B")<!>
+val cString = C().toString() // must not be calculated
+val dString = D().toString() // must not be calculated
+
+const val arrayString = <!EVALUATED: `true`!>checkToStringCorrectness(arrayOf(A(), B()).toString(), "[Ljava.lang.Object;")<!>
+const val intArrayString = <!EVALUATED: `true`!>checkToStringCorrectness(intArrayOf(1, 2, 3).toString(), "[I")<!>
+
+const val checkA = <!EVALUATED: `true`!>theSameObjectToString(A())<!>
+const val checkStringBuilder1 = <!EVALUATED: `true`!>theSameObjectToString(StringBuilder())<!>
+const val checkStringBuilder2 = <!EVALUATED: `true`!>theSameObjectToString(StringBuilder("Some Builder"))<!>