remove warning filter for `datetime.datetime.utcfromtimestamp`

[kevinjqliu]

Apache Iceberg version

None

Please describe the bug 🐞

datetime.datetime.utcfromtimestamp is deprecated starting from 3.12
https://docs.python.org/3.12/library/datetime.html#datetime.datetime.utcfromtimestamp

Pyspark still use datetime.datetime.utcfromtimestamp, which was recently changed apache/spark@8e02a64#diff-bb02965370d515ec7add7967bc949c18c88ffc7346cceaebefb84907dfdce903L437 and will be available in version 4.0

Need to keep the warning filter until pyspark 4.0

[github-actions]

This issue has been automatically marked as stale because it has been open for 180 days with no activity. It will be closed in next 14 days if no further activity occurs. To permanently prevent this issue from being considered stale, add the label 'not-stale', but commenting on the issue is preferred when possible.

[github-actions]

This issue has been closed because it has not received any activity in the last 14 days since being marked as 'stale'

[kevinjqliu]

pyspark 4.0 is out https://pypi.org/project/pyspark/
we can close this soon

[kevinjqliu]

#2566 to upgrade to spark 4.x