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

compiler/testData/diagnostics/tests/inference/fixationOrderForProperConstraints.fir.kt

@@ -0,0 +1,7 @@
+// !WITH_NEW_INFERENCE
+// NI_EXPECTED_FILE
+fun <X, Y, Z> foo(f: (Y) -> Z, g: (X) -> Y, x: X): Z = f(g(x))
+
+// TODO: Actually, this is a bug and will work when new inference is enabled
+// see ([NI] Select variable with proper non-trivial constraint first) for more details
+fun test() = foo({ it + 1 }, { it.length }, "")