refactor(example_data): replace the way the birth_names data is loaded to DB (#18060)

* refactor: replace the way the birth_names data is loaded to DB

* fix failed unit test

* fix failed unit test

* fix failed tests

* fix pass wrong flag of support datetime type

* remove unused fixture

tests/example_data/data_loading/base_data_loader.py

@@ -0,0 +1,33 @@
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing,
+#  software distributed under the License is distributed on an
+#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#  KIND, either express or implied.  See the License for the
+#  specific language governing permissions and limitations
+#  under the License.
+from __future__ import annotations
+
+from abc import ABC, abstractmethod
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from tests.common.example_data.data_loading.data_definitions.types import Table
+
+
+class DataLoader(ABC):
+    @abstractmethod
+    def load_table(self, table: Table) -> None:
+        ...
+
+    @abstractmethod
+    def remove_table(self, table_name: str) -> None:
+        ...