Add R packages to Singularity.rstudio

The added packages are often needed to build/install other packages.

added 16 commits

• aeedcb9a...3e8c50d3 - 15 commits from branch master
• f1c57d38 - Merge branch 'master' into 'heriche-master-patch-94259'

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merged

mentioned in commit 66f9ea1a