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

compiler/testData/diagnostics/tests/controlFlowAnalysis/kt3444.fir.kt

@@ -0,0 +1,13 @@
+fun box() {
+    fun local():Int {
+    }
+}
+
+interface X {
+    fun f(): Boolean
+}
+
+val m = object : X {
+    override fun f(): Boolean {
+    }
+}