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

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/smartcasts/SmartcastAmbiguitites.fir.kt

@@ -0,0 +1,16 @@
+interface B {
+  fun bar() {}
+}
+
+class C() {
+  fun bar() {
+  }
+}
+
+fun test(a : Any?) {
+  if (a is B) {
+      if (a is C) {
+          a.<!AMBIGUITY!>bar<!>();
+      }
+  }
+}

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/smartcasts/SmartcastsForStableIdentifiers.fir.kt

@@ -0,0 +1,86 @@
+// FILE: a.kt
+package example.ns
+
+val y : Any? = 2
+
+// FILE: b.kt
+package example
+
+import example.ns.y
+
+object Obj {
+    val y : Any? = 2
+}
+
+class AClass() {
+    companion object {
+        val y : Any? = 2
+    }
+}
+
+val x : Any? = 1
+
+fun Any?.vars(a: Any?) : Int {
+    var b: Int = 0
+    if (example.ns.y is Int) {
+        b = y
+    }
+    if (example.ns.y is Int) {
+        b = example.ns.y
+    }
+    if (Obj.y is Int) {
+        b = Obj.y
+    }
+    if (example.Obj.y is Int) {
+        b = Obj.y
+    }
+    if (AClass.y is Int) {
+        b = AClass.y
+    }
+    if (example.AClass.y is Int) {
+        b = AClass.y
+    }
+    if (x is Int) {
+        b = x
+    }
+    if (example.x is Int) {
+        b = x
+    }
+    if (example.x is Int) {
+        b = example.x
+    }
+    return 1
+}
+
+fun Any?.foo() : Int {
+    if (this is Int)
+      return this
+    if (this@foo is Int)
+      return this
+    if (this@foo is Int)
+      return this@foo
+    if (this is Int)
+      return this@foo
+    return 1
+}
+
+
+interface T {}
+
+open class C {
+    fun foo() {
+       var t : T? = null
+       if (this is T) {
+          t = this
+       }
+       if (this is T) {
+          t = this@C
+       }
+       if (this@C is T) {
+          t = this
+       }
+       if (this@C is T) {
+          t = this@C
+       }
+    }
+}