[ci] Test with dune 2.8 instead of dune 2.7

9 jobs for !2781 with feature/ci-use-dune-2.8 in 6 minutes and 45 seconds (queued for 4 seconds)
Child pipeline (parent) detached
Status Name Job ID Coverage
  Configure
passed configure #40625

00:00:37

passed configure #40571

00:01:09

 
  Linting
passed black (python) #40573

00:00:48

passed pylint-flake8 (python) #40626

00:02:28

failed pylint-flake8 (python) #40576

00:00:37

 
  Select
passed select tests #40577

00:01:51

 
  Build
passed compile cpp #40582

00:00:47

 
  Test
passed test cpp #40586

00:00:57

passed test python #40589

00:01:24