[Epic] A collection of FFI related tasks

[alamb]

Is your feature request related to a problem or challenge?

We are adding FFI bindings to Datafusion (see https://crates.io/crates/datafusion-ffi) mostly for API stability (e.g. so python wrappers can use table providers compiled with different versions of DataFusion I think)

Describe the solution you'd like

No response

Describe alternatives you've considered

No response

Additional context

Tasks / PRs:

• Add CatalogProvider and SchemaProvider to FFI Crate #15280
• Expose user defined functions in the FFI #14562
• Make it easier to use rust DataFusion UDFs in datafusion-python datafusion-python#1017
• DeltaLake integration not working (Python) (FFI Table providers not working) datafusion-python#1077
• feat: Add Aggregate UDF to FFI crate #14775
• feat: Add ScalarUDF support in FFI crate #14579
• FFI support for versions and alternate tokio runtimes #13937
• Add TableProvider::insert_into into FFI Bindings #14391
• FFI initial implementation #12920
• feat: add user defined table function support datafusion-python#1113

[alamb]

FYI @timsaucer in case you have other items you want to add here

[ion-elgreco]

apache/datafusion-python#1077 the Ffi TableProvider doesn't seem to work anymore

[alamb]

#14842 the Ffi TableProvider doesn't seem to work anymore

Added