Improve CSCS CI

[lorenzovarese]

• Display the table with the results on the CSCS CI directly on GithHub if possible.
• Display both the results for the benchmarks.jl and benchmarks_advection.jl in the CI. It is useful to understand if the performance improvement/regression is impacting both benchmark suite at the same time.

Note: Currently, we have the following CI processes in place:

• GitHub that runs tests
• GitHub that builds documentation
• GitHub that runs benchmarks for AirspeedVelocity.jl
• CSCS CI that runs both tests and the Airspeed Velocity benchmark suite on Piz Daint.