Proposed commit message

[ping_federate] Apply timezone setting correctly

In the audit data stream, configure the `decode_cef` Beats processor[1]
to use the provided time zone, to avoid it mislabelling a local time as
UTC.

[1]: https://www.elastic.co/docs/reference/beats/filebeat/processor-decode-cef

Discussion

Here's how a system test document's output changes with this setting:

The event.ingested value is the correct ingest time.

In 1.0.0, the local time is taken to be UTC, but in the fixed version it is assigned the configured offset and stored as the correct UTC equivalent.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices