add missing UCX-CUDA dep to GROMACS for foss-2021a-CUDA-11.3.1

[smoors]

(created using eb --new-pr)

[lexming]

@boegelbot: please test @ generoso

[boegelbot]

@lexming: Request for testing this PR well received on login1

PR test command 'EB_PR=14859 EB_ARGS= /opt/software/slurm/bin/sbatch --job-name test_PR_14859 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 7963

Test results coming soon (I hope)...

- notification for comment with ID 1026309486 processed

Message to humans: this is just bookkeeping information for me,
it is of no use to you (unless you think I have a bug, which I don't).

[lexming]

Test report by @lexming
SUCCESS
Build succeeded for 2 out of 2 (2 easyconfigs in total)
node207.hydra.os - Linux centos linux 7.9.2009, x86_64, Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz, Python 2.7.5
See https://gist.github.com/ac38360209713f5d31c7688e38beaddd for a full test report.

[boegelbot]

Test report by @boegelbot
SUCCESS
Build succeeded for 2 out of 2 (2 easyconfigs in total)
cns4 - Linux Rocky Linux 8.5, x86_64, Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz (haswell), Python 3.6.8
See https://gist.github.com/c0b7592d394108375364b7165d3d3231 for a full test report.

[lexming]

LGTM

[lexming]

Going in, thanks @smoors !