Converted kitchen sink back to matching the others with code systems inlined as dict

Author: kevinschaper

tests/test_loaders_dumpers/models/kitchen_sink.yaml

@@ -256,7 +256,6 @@ classes:
         multivalued: true
       code systems:
         range: CodeSystem
-        inlined_as_list: true
         inlined: true
         multivalued: true
     slots:

tests/test_loaders_dumpers/models/kitchen_sink_pydantic.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 from datetime import datetime, date
 from enum import Enum
-from typing import List, Dict, Optional, Any, Union
+from typing import List, Dict, Optional, Any, Union, Literal
 from pydantic import BaseModel as BaseModel, Field
 from linkml_runtime.linkml_model import Decimal