Adds Iterable<DataRowSchema>.toDataFrame() overload

[Jolanrensen]

Fixes #1880

Added Iterable.toDataFrame() overload for DataRowSchema types,
compiler plugin test in :samples, because the compiler plugin is live there.

This fixes the compiler plugin creating a new type immediately when turning a list of @DataSchema annotated classes into a dataframe.

[Jolanrensen]

As expected, this directly touches the kotlin-spark dev example :D (where this limitation was detected) I'll fix the example right away

[Jolanrensen]

A workaround for #1908 could be to write the function like this:

@JvmName("dataRowSchemaIterableToDataFrame")
@Suppress("INCORRECT_LEFT_COMPONENT_OF_INTERSECTION")
public inline fun <reified T : DataRowSchema> Iterable<T>.toDataFrame(): DataFrame<T & Any> =
    @DisableInterpretation
    toDataFrame {
        properties()
    }

But notebooks don't like T & Any and it could better be solved from the compiler plugin side I believe.