Use the folder from which the R session is started as the renv project folder

[dklein-pik]

Purpose of this PR

Fixing https://github.com/remindmodel/development_issues/issues/305

The .Rprofile always sets the renv project folder to the folder from which the R session is stared. Prerequisite: the folder needs to contain the .Rprofile.
Result: if started in a run folder, renv uses the renv-library from the run folder and not from the REMIND main folder.

cd /p/tmp/dklein/remind-renvtest/
Rscript -e "setwd('output/testOneRegi'); system('Rscript -e \"renv::project()\"')"
cd output/testOneRegi/
Rscript -e "renv::project()"

Both return [1] "/p/tmp/dklein/remind-renvtest/output/testOneRegi"

Type of change

• Bug fix

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
• I checked that the in-code documentation is up-to-date
• I adjusted the reporting in remind2 where it was needed
• I adjusted forbiddenColumnNames in readCheckScenarioConfig.R in case the PR leads to deprecated switches
• All automated model tests pass (FAIL 0 in the output of make test)
• The changelog CHANGELOG.md has been updated correctly

Further information (optional):

• Test runs are here: /p/tmp/dklein/remind-renvtest/output/testOneRegi

[dklein-pik]

The solution looks embarrassingly simple. But it was hard to figure what happens. Thank you Oli and Pascal, and sorry for the inconvenience.

[orichters]

Thanks for fixing it!

[orichters]

thanks!