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

compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt1270.fir.kt

@@ -0,0 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+//KT-1270 Poor highlighting when trying to dereference a nullable reference
+
+package kt1270
+
+fun foo() {
+    val sc = <!UNRESOLVED_REFERENCE!>java.util.<!UNRESOLVED_REFERENCE!>HashMap<!><String, SomeClass>()[""]<!>
+    val value = sc.<!UNRESOLVED_REFERENCE!>value<!>
+}
+
+private class SomeClass() {
+    val value : Int = 5
+}