[ci] Simplify

4 jobs for python-only in 1 minute and 20 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build
passed #247441
docker
build

00:00:41

 
  Test
passed #247444
docker
test_py310

00:00:38

25.0%
passed #247442
docker
test_py38

00:00:38

25.0%
passed #247443
docker
test_py39

00:00:38

25.0%