make renv sysreqs feature usable with RedHat based linux distros

[michaelmayer2]

With the latest release of renv I get

> sysreqs(packages=x$Package,distro="centos")
The requisite system packages can be installed with:
- sudo <install> -y cmake
- sudo <install> -y gdal
- sudo <install> -y gdal-devel
- sudo <install> -y geos-devel
- sudo <install> -y libcurl-devel
- sudo <install> -y libicu-devel
- sudo <install> -y libxml2-devel
- sudo <install> -y make
- sudo <install> -y openssl-devel
- sudo <install> -y pandoc
- sudo <install> -y pandoc-citeproc
- sudo <install> -y proj-devel
- sudo <install> -y proj-epsg
- sudo <install> -y sqlite-devel
- sudo <install> -y udunits2-devel
- sudo <install> -y v8-devel
- sudo <install> -y xz

Depending on the RedHat version it should use either yum or dnf instead of <install> - Nit-pickingly one even could consider clubbing all the lines together in one yum/dnf call like yum install -y cmake gdal gdal-devel....

On a related note: sysreqs at the moment does not consider any pre_install or post_install scripts (cf. https://github.com/rstudio/r-system-requirements/blob/fb86c68dcfd51a80034dcad925bdf7660cfc2bd2/rules/libwebp.json#L57-L61)

[kevinushey]

Nit-pickingly one even could consider clubbing all the lines together

FWIW you can use sysreqs(collapse = TRUE) for that.