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

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/AssignmentInInitializer.fir.kt

@@ -0,0 +1,21 @@
+// KT-2825  DataFlowInfo is not retained after assignment
+
+interface A
+
+interface B : A {
+    fun foo()
+}
+
+fun baz(b: B) = b
+
+fun bar1(a: A) {
+    val b = a as B
+    a.foo()
+    b.foo()
+}
+
+fun bar2(a: A) {
+    val b = baz(a as B)
+    a.foo()
+    b.foo()
+}