Func-adl-servicex

* Supports CMS and ATLAS C++ backends
* Now automatically uses the default return type for any dataset passed in
* Support dictionaries and other types as the final `Select` statement. In this case, the dataset will return whatever its default format it.
* Support lists of URL's for a dataset and single urls's, rather than just dataset names
* Return `qastle` rather than run the request when asked for
* Support titles being passed in

* Allows a top level `Select` statement rather than a `AsPandas` or `AsAwkward`, etc. This means you can use a dictionary to specify the column names. In this case, the data format that comes back is the default for the data source
* Rather than having to be told the default return datasource, uses the new `ServiceXDataset` interface to determine what the user has passed in. This is nice as it now means the user need only specify once what type of data source they are sending through the system.

Same sort of error occured for `qastle` as `uproot` - the filename was missing.

* Make sure the tree name is being probably passed in `uproot` backend queries.

This will allow the user to return the qastle rather than returning the actual executor

Supports file lists given to the c-tors, not just strings, or services datasets