[FEATURE REQUEST]: udf support for dynamic assemblies

In a recent talk [Michael Rys](https://channel9.msdn.com/Shows/On-NET/Whats-New-in-NET-for-Apache-Spark-v111) showed udfs being used in a notebook setting with Azure Synapse.

I was under the impression udfs worked in compiled assemblies only.

Not sure the how the notebooks are coded but when I try to define a udf in F# interactive, I get the following error:
```
System.NotSupportedException: The invoked member is not supported in a dynamic assembly.
at System.Reflection.Emit.InternalAssemblyBuilder.get_Location()
at Microsoft.Spark.Utils.UdfSerDe.SerializeType(Type type)
```

It would be nice if the creation of Spark udfs in most interactive environments was supported. Let us know if there any plans for this.