bug#78173: Duplicate package r-r4rna

[nomike (they/them)]

Hi!

I just found out, that the package r-r4rna is defined twice:
https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/bioconductor.scm#n10119
https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/bioinformatics.scm#n15070

It's different versions, but we probably want to either have only one, 
or have them in one file with different variable names.

Cheers

nomike