FIR IDE: implement getCallableNames/getClassifierNames in more scopes

compiler/fir/jvm/src/org/jetbrains/kotlin/fir/scopes/jvm/JvmMappedScope.kt

@@ -76,6 +76,14 @@ class JvmMappedScope(
         declaredMemberScope.processClassifiersByNameWithSubstitution(name, processor)
     }
 
+    override fun getCallableNames(): Set<Name> {
+        return declaredMemberScope.getCallableNames()
+    }
+
+    override fun getClassifierNames(): Set<Name> {
+        return declaredMemberScope.getClassifierNames()
+    }
+
     companion object {
         data class Signatures(val whiteListSignaturesByName: Map<Name, Set<String>>, val constructorBlackList: Set<String>) {
             fun isEmpty() = whiteListSignaturesByName.isEmpty() && constructorBlackList.isEmpty()

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirClassSubstitutionScope.kt

@@ -521,6 +521,14 @@ class FirClassSubstitutionScope(
             processor(constructor)
         }
     }
+
+    override fun getCallableNames(): Set<Name> {
+        return useSiteMemberScope.getCallableNames()
+    }
+
+    override fun getClassifierNames(): Set<Name> {
+        return useSiteMemberScope.getClassifierNames()
+    }
 }
 
 // Unlike other cases, return types may be implicit, i.e. unresolved