Remove dependency eval_type_backport from tests

[pankajastro]

For some Python versions tests are failing with error

Traceback (most recent call last):
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_typing_extra.py", line 558, in _eval_type_backport
    return _eval_type(value, globalns, localns, type_params)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_typing_extra.py", line 592, in _eval_type
    return typing._eval_type(  # type: ignore
  File "/opt/hostedtoolcache/Python/3.9.20/x64/lib/python3.9/typing.py", line 292, in _eval_type
    return t._evaluate(globalns, localns, recursive_guard)
  File "/opt/hostedtoolcache/Python/3.9.20/x64/lib/python3.9/typing.py", line 554, in _evaluate
    eval(self.__forward_code__, globalns, localns),
  File "<string>", line 1, in <module>
TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/bin/airflow", line 8, in <module>
    sys.exit(main())
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/__main__.py", line 62, in main
    args.func(args)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/cli/cli_config.py", line 49, in command
    return func(*args, **kwargs)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/utils/providers_configuration_loader.py", line 55, in wrapped_function
    return func(*args, **kwargs)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/cli/commands/db_command.py", line 66, in resetdb
    db.resetdb(skip_init=args.skip_init, use_migration_files=args.use_migration_files)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/utils/session.py", line 97, in wrapper
    return func(*args, session=session, **kwargs)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/utils/db.py", line 1704, in resetdb
    import_all_models()
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/models/__init__.py", line 65, in import_all_models
    import airflow.models.serialized_dag
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/models/serialized_dag.py", line 39, in <module>
    from airflow.serialization.serialized_objects import SerializedDAG
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 72, in <module>
    from airflow.serialization.pydantic.taskinstance import TaskInstancePydantic
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/airflow/serialization/pydantic/taskinstance.py", line [84](https://github.com/astronomer/astronomer-cosmos/actions/runs/12018236731/job/33502303435?pr=1340#step:7:85), in <module>
    class TaskInstancePydantic(BaseModelPydantic, LoggingMixin):
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_model_construction.py", line 221, in __new__
    set_model_fields(cls, bases, config_wrapper, ns_resolver)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_model_construction.py", line 593, in set_model_fields
    fields, class_vars = collect_model_fields(cls, bases, config_wrapper, ns_resolver, typevars_map=typevars_map)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_fields.py", line 112, in collect_model_fields
    type_hints = _typing_extra.get_cls_type_hints(cls, ns_resolver=ns_resolver, lenient=True)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_typing_extra.py", line 472, in get_cls_type_hints
    hints[name] = eval_type(value, globalns, localns, lenient=lenient)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_typing_extra.py", line 4[98](https://github.com/astronomer/astronomer-cosmos/actions/runs/12018236731/job/33502303435?pr=1340#step:7:99), in eval_type
    return eval_type_backport(value, globalns, localns)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_typing_extra.py", line 534, in eval_type_backport
    return _eval_type_backport(value, globalns, localns, type_params)
  File "/home/runner/.local/share/hatch/env/virtual/astronomer-cosmos/Za_bFbg4/tests.py3.9-2.10/lib/python3.9/site-packages/pydantic/_internal/_typing_extra.py", line 566, in _eval_type_backport
    raise TypeError(
TypeError: Unable to evaluate type annotation 'logging.Logger | None'. If you are making use of the new typing syntax (unions using `|` since Python 3.10 or builtins subscripting since Python 3.9), you should either replace the use of new syntax with the existing `typing` constructs or install the `eval_type_backport` package

CI: https://github.com/astronomer/astronomer-cosmos/actions/runs/12018236731/job/33502303435?pr=1340