Reduce CRAN check time for Windows

[lorenzwalthert]

CRAN asks to reduce check time on Windows, probably it takes too long due to calling R from R (linux check time is much shorter).

• new skip_on_windows_cran() to ensure checks run on other places
• prioritise checks that might break with new base R or language: script hooks such as pkgdown, as other hooks might be checked with regular hook update scripts and don't pose immediate problem since hook environment is locked to package version with renv.
• check that each hook has a similar amount of hooks executed on CRAN.

[lorenzwalthert]

Closed with #582.