Move IR interpreter's tests from ir/loweredIr directory into box

compiler/testData/codegen/box/involvesIrInterpreter/dumpIrAndCheck/ifConstVal.kt

@@ -0,0 +1,29 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_K1: JVM_IR
+
+const val flag = true
+const val value = 10
+const val condition = if (flag) "True" else "Error"
+const val withWhen = when (flag) {
+    true -> "True"
+    else -> "Error"
+}
+const val withWhen2 = when {
+    flag == true -> "True"
+    else -> "Error"
+}
+const val withWhen3 = when(value) {
+    10 -> "1"
+    100 -> "2"
+    else -> "3"
+}
+const val multibranchIf = if (value == 100) 1 else if (value == 1000) 2 else 3
+
+fun box(): String {
+    if (condition != "True") return "Fail 1"
+    if (withWhen != "True") return "Fail 2"
+    if (withWhen2 != "True") return "Fail 3"
+    if (withWhen3 != "1") return "Fail 4"
+    if (multibranchIf != 3) return "Fail 5"
+    return "OK"
+}