[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/inference/upperBounds/useBoundsIfUnknownParameters.fir.kt

@@ -0,0 +1,12 @@
+// !WITH_NEW_INFERENCE
+package Hello
+
+open class Base<T>
+class StringBase : Base<String>()
+
+class Client<T, X: Base<T>>(x: X)
+
+fun test() {
+    val c = Client(StringBase()) // Type inference fails here for T.
+    val i : Int = c
+}