more CI speedup experiments

- turn off some of the build tests
- increase test threads to 8
- build with --disable-static
- suppress the non-system tests under bin/tests (timers, task, etc)
4 jobs for speedup-ci in 11 minutes and 11 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Build
passed build:debian:sid:amd64 #2231
docker linux

00:05:01

passed build:debian:sid:i386 #2232
docker linux

00:05:28

 
  Test
passed test:debian:sid:amd64 #2233
docker linux

00:05:38

passed test:debian:sid:i386 #2234
docker linux

00:05:41