### Apache Airflow version

2.2.1 (latest released)

### Operating System

debian

### Versions of Apache Airflow Providers

apache-airflow==2.2.1
apache-airflow-providers-amazon==2.3.0
apache-airflow-providers-ftp==2.0.1
apache-airflow-providers-google==6.0.0
apache-airflow-providers-http==2.0.1
apache-airflow-providers-imap==2.0.1
apache-airflow-providers-jira==2.0.1
apache-airflow-providers-mysql==2.1.1
apache-airflow-providers-postgres==2.3.0
apache-airflow-providers-redis==2.0.1
apache-airflow-providers-sqlite==2.0.1
apache-airflow-providers-ssh==2.2.0

### Deployment

Other Docker-based deployment

### Deployment details

Dask executor, custom-built Docker images, postgres 12.7 backend

### What happened

I upgraded Airflow from 2.0.2 to 2.2.1, and some DAGs I have that used dateutils.relativedelta objects as schedule intervals stopped running

### What you expected to happen

The [code](https://github.com/apache/airflow/blob/2.2.1/airflow/models/dag.py#L101) for the schedule_interval parameter of the DAG constructor indicates that a relativedelta object is allowed, so I expected the DAG to be correctly parsed and scheduled.

### How to reproduce

Create a DAG that has a relativedelta object as its schedule interval, and it will not appear in the UI or be scheduled.

### Anything else

Here is the code that causes the failure within the PR where it was introduced: [link](https://github.com/apache/airflow/pull/17414/files#diff-ed37fe966e8247e0bfd8aa28bc2698febeec3807df5f5a00545ca80744f8aff6R267)

Here are the logs for the exception, found in the scheduler logs for the file that contains the offending DAG
<details><pre>
ERROR   | {dagbag.py:528} - 'relativedelta' object has no attribute 'total_seconds'
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/airflow/models/dagbag.py", line 515, in collect_dags
    found_dags = self.process_file(filepath, only_if_updated=only_if_updated, safe_mode=safe_mode)
  File "/usr/local/lib/python3.9/site-packages/airflow/models/dagbag.py", line 298, in process_file
    found_dags = self._process_modules(filepath, mods, file_last_changed_on_disk)
  File "/usr/local/lib/python3.9/site-packages/airflow/models/dagbag.py", line 401, in _process_modules
    dag.timetable.validate()
  File "/usr/local/lib/python3.9/site-packages/airflow/timetables/interval.py", line 274, in validate
    if self._delta.total_seconds() <= 0:
AttributeError: 'relativedelta' object has no attribute 'total_seconds'
</pre></details>

### 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)

airflow/timetables/interval.py
#
#
import datetime
from typing import Any, Dict, Optional, Union
from croniter import CroniterBadCronError, CroniterBadDateError, croniter
from dateutil.relativedelta import relativedelta
from pendulum import DateTime
from pendulum.tz.timezone import Timezone
from airflow.compat.functools import cached_property
from airflow.exceptions import AirflowTimetableInvalid
from airflow.timetables.base import DagRunInfo, DataInterval, TimeRestriction, Timetable
from airflow.utils.dates import cron_presets
from airflow.utils.timezone import convert_to_utc, make_aware, make_naive
Delta = Union[datetime.timedelta, relativedelta]
class _DataIntervalTimetable(Timetable):