### Apache Airflow version

2.5.0

### What happened

After upgrade 2.2.5 -> 2.5.0 scheduler failing with error:
```
AttributeError: 'V1PodSpec' object has no attribute '_ephemeral_containers' 
```
tried with no luck:
```
airflow dags reserialize
```
Full Traceback:
```verilog
Traceback (most recent call last):
  File "/home/airflow/.local/bin/airflow", line 8, in <module>
    sys.exit(main())
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/__main__.py", line 39, in main
    args.func(args)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/cli/cli_parser.py", line 52, in command
    return func(*args, **kwargs)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/utils/cli.py", line 108, in wrapper
    return f(*args, **kwargs)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/cli/commands/scheduler_command.py", line 73, in scheduler
    _run_scheduler_job(args=args)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/cli/commands/scheduler_command.py", line 43, in _run_scheduler_job
    job.run()
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/jobs/base_job.py", line 247, in run
    self._execute()
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/jobs/scheduler_job.py", line 759, in _execute
    self._run_scheduler_loop()
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/jobs/scheduler_job.py", line 889, in _run_scheduler_loop
    num_finished_events = self._process_executor_events(session=session)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/jobs/scheduler_job.py", line 705, in _process_executor_events
    self.executor.send_callback(request)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/executors/celery_kubernetes_executor.py", line 213, in send_callback
    self.callback_sink.send(request)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/utils/session.py", line 75, in wrapper
    return func(*args, session=session, **kwargs)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/callbacks/database_callback_sink.py", line 34, in send
    db_callback = DbCallbackRequest(callback=callback, priority_weight=10)
  File "<string>", line 4, in __init__
  File "/home/airflow/.local/lib/python3.9/site-packages/sqlalchemy/orm/state.py", line 480, in _initialize_instance
    manager.dispatch.init_failure(self, args, kwargs)
  File "/home/airflow/.local/lib/python3.9/site-packages/sqlalchemy/util/langhelpers.py", line 70, in __exit__
    compat.raise_(
  File "/home/airflow/.local/lib/python3.9/site-packages/sqlalchemy/util/compat.py", line 207, in raise_
    raise exception
  File "/home/airflow/.local/lib/python3.9/site-packages/sqlalchemy/orm/state.py", line 477, in _initialize_instance
    return manager.original_init(*mixed[1:], **kwargs)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/models/db_callback_request.py", line 46, in __init__
    self.callback_data = callback.to_json()
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/callbacks/callback_requests.py", line 91, in to_json                     
    val = BaseSerialization.serialize(self.__dict__, strict=True)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 407, in serialize
    {str(k): cls.serialize(v, strict=strict) for k, v in var.items()}, type_=DAT.DICT
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 407, in <dictcomp>
    {str(k): cls.serialize(v, strict=strict) for k, v in var.items()}, type_=DAT.DICT
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 450, in serialize
    return cls._encode(cls.serialize(var.__dict__, strict=strict), type_=DAT.SIMPLE_TASK_INSTANCE)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 407, in serialize
    {str(k): cls.serialize(v, strict=strict) for k, v in var.items()}, type_=DAT.DICT
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 407, in <dictcomp>
    {str(k): cls.serialize(v, strict=strict) for k, v in var.items()}, type_=DAT.DICT
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 407, in serialize
    {str(k): cls.serialize(v, strict=strict) for k, v in var.items()}, type_=DAT.DICT
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 407, in <dictcomp>
    {str(k): cls.serialize(v, strict=strict) for k, v in var.items()}, type_=DAT.DICT
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/serialization/serialized_objects.py", line 412, in serialize
    json_pod = PodGenerator.serialize_pod(var)
  File "/home/airflow/.local/lib/python3.9/site-packages/airflow/kubernetes/pod_generator.py", line 411, in serialize_pod
    return api_client.sanitize_for_serialization(pod)
  File "/home/airflow/.local/lib/python3.9/site-packages/kubernetes/client/api_client.py", line 241, in sanitize_for_serialization
    return {key: self.sanitize_for_serialization(val)
  File "/home/airflow/.local/lib/python3.9/site-packages/kubernetes/client/api_client.py", line 241, in <dictcomp>
    return {key: self.sanitize_for_serialization(val)
  File "/home/airflow/.local/lib/python3.9/site-packages/kubernetes/client/api_client.py", line 237, in sanitize_for_serialization  
    obj_dict = {obj.attribute_map[attr]: getattr(obj, attr)
  File "/home/airflow/.local/lib/python3.9/site-packages/kubernetes/client/api_client.py", line 239, in <dictcomp>
    if getattr(obj, attr) is not None}
  File "/home/airflow/.local/lib/python3.9/site-packages/kubernetes/client/models/v1_pod_spec.py", line 397, in ephemeral_containers
    return self._ephemeral_containers
AttributeError: 'V1PodSpec' object has no attribute '_ephemeral_containers'
```

### What you think should happen instead

_No response_

### How to reproduce

_No response_

### Operating System

Debian 11 (bullseye)

### Versions of Apache Airflow Providers

_No response_

### Deployment

Official Apache Airflow Helm Chart

### Deployment details

AWS EKS

### Anything else

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

#
#
#
from __future__ import annotations
import datetime
import pickle
from unittest import mock
from unittest.mock import MagicMock
import pytest
from kubernetes.client import models as k8s
from pytest import param
from sqlalchemy.exc import StatementError
from airflow import settings
from airflow.models import DAG
from airflow.serialization.enums import DagAttributeTypes, Encoding
from airflow.serialization.serialized_objects import BaseSerialization
from airflow.settings import Session
from airflow.utils.sqlalchemy import ExecutorConfigType, nowait, prohibit_commit, skip_locked, with_row_locks
from airflow.utils.state import State
from airflow.utils.timezone import utcnow
TEST_POD = k8s.V1Pod(spec=k8s.V1PodSpec(containers=[k8s.V1Container(name="base")]))
class TestSqlAlchemyUtils:
    def setup_method(self):
        session = Session()
        
        
        if session.bind.dialect.name == "postgresql":
            session.execute("SET timezone='Europe/Amsterdam'")
        self.session = session
    def test_utc_transformations(self):