Remove python-dateutil error suppression for pytest once >2.8.2 is released

[rmartin16]

Describe the bug

For Python 3.12, python-dateutil is currently causing CI to raise an error for using datetime.utcfromtimestamp(). A mitigation was put in place to suppress the error until a new release.

Steps to reproduce

N/A

Expected behavior

Remove the error suppression configuration from pyproject.toml once a release >2.8.2 is cut.

[tool.pytest.ini_options]
testpaths = ["tests"]
filterwarnings = [
    "error",
    # suppress until python-dateutil>2.8.2 is released (https://github.com/dateutil/dateutil/issues/1284)
    "ignore:.*datetime.utcfromtimestamp\\(\\) is deprecated.*:DeprecationWarning:",
]

Screenshots

No response

Environment

N/A

Logs

No response

Additional context

RE: #1290

[rmartin16]

incoming: https://github.com/dateutil/dateutil/releases/tag/2.9.0