Generate super classes and overridden functions in proper scope

Such references require proper scope so that local symbols are bound.
Example:

```
fun <T> outer() {
    abstract class ALocal<S : T> {
        abstract fun bar()
    }

    class Local<S : T> : ALocal<S>() {
        override fun bar() {}
    }
}
```

Here local classes have type parameters with upper bounds depending on
function type parameters, and members overriding members in other local
classes.

compiler/testData/ir/irText/declarations/parameters/localFun.txt

@@ -1,9 +1,13 @@
 FILE fqName:<root> fileName:/localFun.kt
   FUN name:outer visibility:public modality:FINAL <TT> () returnType:Unit flags:
     TYPE_PARAMETER name:TT index:0 variance: upperBounds:[kotlin.Any?]
+      superClassifiers:
+        CLASS IR_EXTERNAL_DECLARATION_STUB CLASS name:Any modality:OPEN visibility:public flags:
     BLOCK_BODY
       FUN name:test1 visibility:local modality:FINAL <T> (i:kotlin.Int, j:T) returnType:Unit flags:
         TYPE_PARAMETER name:T index:0 variance: upperBounds:[kotlin.Any?]
+          superClassifiers:
+            CLASS IR_EXTERNAL_DECLARATION_STUB CLASS name:Any modality:OPEN visibility:public flags:
         VALUE_PARAMETER name:i index:0 type:kotlin.Int flags:
         VALUE_PARAMETER name:j index:1 type:T flags:
         BLOCK_BODY