Experimental fixes: additional tests, handle local declarations

idea/testData/quickfix/experimental/functionInLocalClass.kt

@@ -0,0 +1,20 @@
+// "Add '@MyExperimentalAPI' annotation to 'outer'" "true"
+// COMPILER_ARGUMENTS: -Xuse-experimental=kotlin.Experimental
+// WITH_RUNTIME
+
+@Experimental
+@Target(AnnotationTarget.FUNCTION)
+annotation class MyExperimentalAPI
+
+open class Base {
+    @MyExperimentalAPI
+    open fun foo() {}
+}
+
+class Outer {
+    fun outer() {
+        class Derived : Base() {
+            override fun foo<caret>() {}
+        }
+    }
+}