Restrict typing-extensions 4.14.0 to fix CI temporarily

[amoghrajesh]

Release of typing-extensions: 4.14.0: https://pypi.org/project/typing-extensions/#history breaks our CI mainly due to cadywn dependency. Error stack:

_______ ERROR collecting airflow-core/tests/unit/always/test_secrets.py ________
ImportError while importing test module '/opt/airflow/airflow-core/tests/unit/always/test_secrets.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/local/lib/python3.9/importlib/__init__.py:127: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
airflow-core/tests/unit/always/test_secrets.py:29: in <module>
    from tests_common.test_utils.db import clear_db_variables
devel-common/src/tests_common/test_utils/db.py:24: in <module>
    from airflow.models import (
airflow-core/src/airflow/models/__init__.py:81: in __getattr__
    val = import_string(f"{path}.{name}")
airflow-core/src/airflow/utils/module_loading.py:60: in import_string
    module = import_module(module_path)
/usr/local/lib/python3.9/importlib/__init__.py:127: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
airflow-core/src/airflow/models/dag.py:66: in <module>
    from airflow.assets.evaluation import AssetEvaluator
airflow-core/src/airflow/assets/evaluation.py:34: in <module>
    from airflow.sdk.definitions.asset.decorators import MultiAssetDefinition
task-sdk/src/airflow/sdk/definitions/asset/decorators.py:25: in <module>
    from airflow.providers.standard.operators.python import PythonOperator
providers/standard/src/airflow/providers/standard/operators/python.py:51: in <module>
    from airflow.models.baseoperator import BaseOperator
airflow-core/src/airflow/models/baseoperator.py:40: in <module>
    from airflow.models.taskinstance import TaskInstance, clear_task_instances
airflow-core/src/airflow/models/taskinstance.py:84: in <module>
    from airflow.models.taskmap import TaskMap
airflow-core/src/airflow/models/taskmap.py:31: in <module>
    from airflow.utils.db import exists_query
airflow-core/src/airflow/utils/db.py:59: in <module>
    from airflow.utils.db_manager import RunDBManager
airflow-core/src/airflow/utils/db_manager.py:26: in <module>
    from airflow.api_fastapi.app import create_auth_manager
airflow-core/src/airflow/api_fastapi/app.py:35: in <module>
    from airflow.api_fastapi.execution_api.app import create_task_execution_api_app
airflow-core/src/airflow/api_fastapi/execution_api/app.py:27: in <module>
    from cadwyn import (
/usr/local/lib/python3.9/site-packages/cadwyn/__init__.py:3: in <module>
    from .applications import Cadwyn
/usr/local/lib/python3.9/site-packages/cadwyn/applications.py:30: in <module>
    from cadwyn.changelogs import CadwynChangelogResource, _generate_changelog
/usr/local/lib/python3.9/site-packages/cadwyn/changelogs.py:23: in <module>
    from cadwyn.route_generation import _get_routes
/usr/local/lib/python3.9/site-packages/cadwyn/route_generation.py:34: in <module>
    from cadwyn.schema_generation import (
/usr/local/lib/python3.9/site-packages/cadwyn/schema_generation.py:86: in <module>
    from typing_extensions import _BaseGenericAlias  # pyright: ignore[reportAttributeAccessIssue]
E   ImportError: cannot import name '_BaseGenericAlias' from 'typing_extensions' (/usr/local/lib/python3.9/site-packages/typing_extensions.py)

Example: https://github.com/apache/airflow/actions/runs/15395863318/job/43316849557?pr=51308

Temporarily restricting it.

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