Support sliding windows in AggregateUDF / User Defined Window Functions

[alamb]

Is your feature request related to a problem or challenge?

When implementing an user defined aggregator via AggregateUDF, it is not possible to use the retract_batch API to incrementally update aggregate functions used as window functions

Describe the solution you'd like

I would like to extend somehow so user defined aggregate functions can take advantage of retract_batch

Ideally:

1. Implement the code
2. Update / add an end to end example showing how to use this API -- the existing example is https://github.com/apache/arrow-datafusion/blob/main/datafusion-examples/examples/simple_udaf.rs

Describe alternatives you've considered

No response

Additional context

@stuartcarnie found this gap while working on functionality for IOx

[alamb]

Here is a version @stuartcarnie came up with on a branch: main...stuartcarnie:arrow-datafusion:sgc/sliding_acc#diff-9c622c7093c00fc56f51d4c482e338cdb36171a878faf6d058739b61e1c693daR110-R120

[alamb]

I am starting to work on this (based on @stuartcarnie 's work)

[alamb]

Here is a PR with some tests: #6669

[alamb]

Here is a PR that builds on the one above with the code to implement the feature (based on @stuartcarnie 's changes): #6671