update CI: use centralized CI repo; submiting timing to coq-speed

4 jobs for gen_proofmode in 28 minutes (queued for 4 minutes and 50 seconds)
Status Job ID Name Coverage
  Build
passed #10007
fp
build-coq.8.7.1

00:04:48

passed #10006
fp-timing
build-coq.8.7.2

00:04:36

passed #10005
fp
build-coq.8.8.dev

00:26:57

passed #10004
fp
build-coq.dev

00:14:30