Experimental fixes: additional tests, handle local declarations

idea/testData/quickfix/experimental/nestedClasses.kt

@@ -0,0 +1,23 @@
+// "Add '@MyExperimentalAPI' annotation to containing class 'Outer'" "false"
+// COMPILER_ARGUMENTS: -Xuse-experimental=kotlin.Experimental
+// WITH_RUNTIME
+// ACTION: Add '@MyExperimentalAPI' annotation to 'bar'
+// ACTION: Add '@MyExperimentalAPI' annotation to containing class 'Inner'
+// ACTION: Add '@UseExperimental(MyExperimentalAPI::class)' annotation to 'bar'
+// ERROR: This declaration is experimental and its usage must be marked with '@MyExperimentalAPI' or '@UseExperimental(MyExperimentalAPI::class)'
+
+@Experimental
+annotation class MyExperimentalAPI
+
+@MyExperimentalAPI
+fun foo() {}
+
+class Outer {
+    class Bar {
+        class Inner {
+            fun bar() {
+                foo<caret>()
+            }
+        }
+    }
+}