Fix conda env
Galaxy was down this morning, with a strange error:
Error: /shared/ifbstor1/software/miniconda/envs/_galaxy_/lib/python3.11/lib-dynload/_contextvars.cpython-311-x86_64-linux-gnu.so: file too short
For some reason, this file was empty, probably due to a broken conda package for python 3.11.0.
Reinstalled the conda env manually, with the change included in this MR.
No longer need for R I guess (creates conflicts with python 3.11.6) + install non-broken, newer 3.11 version