Add support for ZoneInfo and generic UTC

[bolkedebruin]

Certain providers rely on other datetime implementations than pendulum and fail to serialize.

See also: #34673

@Taragolis @ferruzzi

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[ferruzzi]

I'd like time to pull these changes and see if it fixes the issue that the system test caught rather than just looking at the code and guessing, but I might not get to that until Tuesday. If anyone gets time to do that, I'd greatly appreciate the help and confirmation.

Test request: Pull these changes down and successfully execute a DAG which passes the timestamp from boto3.client("dynamodb").describe_continuous_backups(TableName=table_name)["ContinuousBackupsDescription"]["PointInTimeRecoveryDescription"]["EarliestRestorableDateTime"] into XCOM and then retrieving it.

[Taragolis]

@ferruzzi, IMO your question about encode/decode datetimes from boto3 covered by this test case

[ferruzzi]

I think you are likely right, ad the code does look good "on paper", I was just hoping to make time to actually try it in a live environment to verify. I won't block the merge if you are confident. 👍

[bolkedebruin]

I'd like time to pull these changes and see if it fixes the issue that the system test caught rather than just looking at the code and guessing, but I might not get to that until Tuesday. If anyone gets time to do that, I'd greatly appreciate the help and confirmation.

Test request: Pull these changes down and successfully execute a DAG which passes the timestamp from boto3.client("dynamodb").describe_continuous_backups(TableName=table_name)["ContinuousBackupsDescription"]["PointInTimeRecoveryDescription"]["EarliestRestorableDateTime"] into XCOM and then retrieving it.

Tuesday is fine, we're not in a hurry. Rather have you confirm it, although the tests should now cover it too.

[ferruzzi]

I thought I could checkout this PR and run it, but if that's possible, I can't seem to figure it out. The code does look good, I was just hoping to verify it in action. Going to approve it as-is.

[bolkedebruin]

Oops, seeing that tests are failing due to import errors. Looking into it.