Support a destination_format option in the date processor to format result with DateTimeFormatter

Is your feature request related to a problem? Please describe.
As a user of the date processor, I am unable to format the result of the conversion of my dates to ISO_8601 format strings. The result of the string is always the entire timestamp String (2023-07-23T15:28:15.081-05:00).

Describe the solution you'd like
An optional parameter in the date processor named destination_format. This format can be https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html similar to the OpenSearch index, and will take the ISO_8601 timestamp String that is generated by the Date processor and format it to the DateTimeFormat specified

Describe alternatives you've considered (Optional)
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

Start by locating the date processor and its existing ISO_8601 result conversion. Check how an optional destination_format would be parsed with Java's DateTimeFormatter, then verify that the formatted result matches the requested pattern while preserving current behavior when the option is absent.