Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/synchronized/exceptionInMonitorExpression.kt

@@ -0,0 +1,17 @@
+// WITH_RUNTIME
+
+fun box(): String {
+    val obj = "" as java.lang.Object
+    val e = IllegalArgumentException()
+    fun m(): Nothing = throw e
+    try {
+        synchronized (m()) {
+            throw AssertionError("Should not have reached this point")
+        }
+    }
+    catch (caught: Throwable) {
+        if (caught !== e) return "Fail: $caught"
+    }
+
+    return "OK"
+}