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

compiler/testData/diagnostics/tests/smartCasts/varnotnull/forEach.fir.kt

@@ -0,0 +1,17 @@
+// !WITH_NEW_INFERENCE
+data class SomeObject(val n: SomeObject?) {
+    fun doSomething() {}
+    fun next(): SomeObject? = n    
+}
+
+
+fun list(start: SomeObject): SomeObject {
+    var e: SomeObject? = start
+    for (i in 0..42) {
+        // Unsafe calls because of nullable e at the beginning
+        e.<!INAPPLICABLE_CANDIDATE!>doSomething<!>()
+        e = e.<!INAPPLICABLE_CANDIDATE!>next<!>()
+    }
+    // Smart cast is not possible here due to next()
+    return e
+}