Merge branch 'robbert/infinite' into 'master'

Overhaul of the `Infinite`/`Fresh` infrastructure

See merge request !58
8 jobs for master in 9 minutes and 22 seconds (queued for 3 minutes and 51 seconds)
Status Job ID Name Coverage
  Build
passed #25644
fp
build-coq.8.7.0

00:02:42

passed #25643
fp
build-coq.8.7.1

00:02:46

passed #25642
fp
build-coq.8.7.2

00:02:48

passed #25641
fp-timing
build-coq.8.8.0

00:02:45

passed #25640
fp
build-coq.8.8.1

00:02:46

passed #25639
fp
build-coq.8.8.2

00:02:55

passed #25638
fp-timing
build-coq.8.9.0

00:03:08

passed #25637
fp
build-coq.dev

00:07:56