Unified way to pass uproot options for filtering the reading of branches (filter_name, ...) in dask and non-dask mode for nanoevents

[nikoladze]

Currently we can pass options for filtering the reading of branches to uproot in dask mode via the uproot_options argument. That works because they are passed to uproot.dask. In non-dask mode it doesn't because uproot options are passed to uproot.open here. It might work via iteritems_options, but then one needs to know all the internals to figure this out ... I wonder if we can have a unified way to do this for dask and non-dask mode, although i don't have a very clear idea how to best do it (without manually putting in all possible uproot options and then deciding internally which ones to pass in where)

Related: usatlas/analysisbase-dask#4 (comment)