Add a subworkflow to upload raw reads to ENA

[mberacochea]

Description of feature

The plan is to support raw reads to INSC (ENA to start with).

ENA data model

The pipeline will have to handle the registration of several pieces of data, plus the validation of the metadata. ENA provides programmatic upload endpoints and tools - https://ena-docs.readthedocs.io/en/latest/submit/reads/programmatic.html. These would need to be wrapper in nextflow modules as the starting point.

I will keep adding details to this ticket over the coming days.