Omit specific packages during installation

[bschilder]

We've been running into some issues with using rworkflows with MSS:

• https://github.com/neurogenomics/MungeSumstats/issues/170

It seems this is at least partly related to installing massive packages like SNPlocs.Hsapiens.dbSNP155.GRCh37 and SNPlocs.Hsapiens.dbSNP155.GRCh38.

Proposed feature: let users omit specific Suggests from installation within the rworkflows action.

[bschilder]

Ideas

• Add something to the .Rprofile to omit specific packages. eg options, or editing the local copy of the DESCRIPTION file.
• Configure remotes:: install_local to omit specific packages