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

compiler/testData/diagnostics/tests/PropertyInitializers.fir.kt

@@ -0,0 +1,9 @@
+class Foo(val a: Int, b: Int) {
+    val c = a + b
+
+    val d: Int
+        get() = a
+
+    val e: Int
+        get() = b
+}