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

compiler/testData/diagnostics/testsWithStdLib/experimental/deeplyNestedClass.fir.kt

@@ -0,0 +1,57 @@
+// !USE_EXPERIMENTAL: kotlin.Experimental
+// FILE: api.kt
+
+package api
+
+@Experimental(Experimental.Level.WARNING)
+@Target(AnnotationTarget.CLASS, AnnotationTarget.FUNCTION)
+annotation class ExperimentalAPI
+
+@ExperimentalAPI
+class C {
+    class D {
+        class E {
+            class F
+        }
+    }
+}
+
+// FILE: usage-propagate.kt
+
+package usage1
+
+import api.*
+
+@ExperimentalAPI
+fun use1() {
+    C.D.E.F()
+}
+
+@ExperimentalAPI
+fun use2(f: C.D.E.F) = f.hashCode()
+
+// FILE: usage-use.kt
+
+package usage2
+
+import api.*
+
+@UseExperimental(ExperimentalAPI::class)
+fun use1() {
+    C.D.E.F()
+}
+
+@UseExperimental(ExperimentalAPI::class)
+fun use2(f: C.D.E.F) = f.hashCode()
+
+// FILE: usage-none.kt
+
+package usage3
+
+import api.*
+
+fun use1() {
+    C.D.E.F()
+}
+
+fun use2(f: C.D.E.F) = f.hashCode()