faster make test

[orichters]

Purpose of this PR

• quicker tests (~ 13 min instead of 22 min)
• instead of running a testOneRegi with action = c, run Rscript start.R --gamscompile. Is somehow much faster (2 min -> 30 seconds)
• don't compile 27 AMT runs, but just a selection of 6 that should cover the modules that are used. Reduces runtime from 12 min to < 5 min. I added a EU21 run as requested below. It is time-consuming as new input data has to be downloaded and distributed twice (before and after the run)

Type of change

• Refactoring

Checklist:

• My code follows the coding etiquette
• I performed a self-review of my own code
• I explained my changes within the PR, particularly in hard-to-understand areas
• All automated model tests pass (FAIL 0 in the output of make test)
• The changelog CHANGELOG.md has been updated correctly

[0UmfHxcvx5J7JoaOhFSs5mncnisTJJ6q]

• Adding a EU21 run is maybe advisable, but also time-consuming as new input data has to be downloaded and distributed twice (before and after the run)

Definitely test EU21. Download times are not an issue on the cluster, people can always test there, or cache locally if they are so inclined.
But changes in regional aggregation are a much more serious source of errors then different module realisations, in my experience.

[orichters]

that is not needed anymore, as runGamsCompile does that alone

[orichters]

Something went wrong with the rebase, not fixing it now as #1539 will lead to merge conflicts anyway so that has to be redone anyway.

[orichters]

Ok, including the EU21 run, time is down from ~22 to 14 min.

[orichters]

@0UmfHxcvx5J7JoaOhFSs5mncnisTJJ6q: Thanks for the comment, I added SSP2EU-EU21-Base to the list of scenarios to be compiled, maybe you can remove "changes requested".

[0UmfHxcvx5J7JoaOhFSs5mncnisTJJ6q]

Sure. I thought you planned on making a new merge request in order to not deal with the conflicts.

[orichters]

Sure. I thought you planned on making a new merge request in order to not deal with the conflicts.

I just wanted to wait for #1536 and #1539 to be merged to avoid fixing the conflicts several times.