check that the assembly is from Ensembl

[siebrenf]

There should be an input requirement for that the assembly is from ensembl. An input function should be able to do this right?

Originally posted by @Maarten-vd-Sande in https://github.com/vanheeringen-lab/seq2science/pull/835#discussion_r837283713

This could and should indeed be checked in the configuration step. Would save some stress later in the workflow.

[stale[bot]]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?