Newmodule clippy (nf-core#3371)

* add umicollapse

* initial clippy module commit

* find working test data

* complete test

* prettier

* add a doi

* Delete main.nf

* Delete meta.yml

* Delete main.nf

* Delete nextflow.config

* Delete test.yml

* remove umicollapse from pytest

* rename gtf to include that its from gencode

* add test for clippy intergenic mode

* remove quay.io