Adding dynamic CSCS-DAINT system class

[august-knox]

Description

Adding a dynamic implementation of the legacy CSCS-DAINT system. Contributes to #531

Test system setup with:

cd benchpark
. setup-env.sh
benchpark system init --dest daint-system cscs-daint 

Visually validate files created in daint-system directory

Run an existing experiment:

benchpark experiment init --dest saxpy-test saxpy +openmp
benchpark setup ./saxpy-test ./daint-system workspace/

Then follow with the ramble commands that are output.

Adding/modifying a system (docs: Adding a System)

• Add/modify systems/system_name/system.py file
• Add/modify a dry run unit test for system_name in .github/workflows/run.yml
• Add/modify systems/all_hardware_descriptions/hardware_name/hardware_description.yaml which will appear in the docs catalogue