Forbid usage of outer's generic parameter in nested class

#KT-1174 In Progress

compiler/testData/diagnostics/tests/inner/outerGenericParam.kt

@@ -0,0 +1,13 @@
+class Outer<T> {
+    class Nested {
+        fun foo(t: <!INACCESSIBLE_OUTER_CLASS_EXPRESSION!>T<!>) = t
+    }
+    
+    class Nested2<T> {
+        fun foo(t: T) = t
+    }
+    
+    inner class Inner {
+        fun foo(t: T) = t
+    }
+}