[gitlab-ci] remove ps, add ghc

1 job for 294-dev-test in 5 minutes and 9 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #1601
test

00:05:09

 
Name Stage Failure
failed
test Test
  I don't know how to install GHC on your system configuration, please install manually
[ FAILURE ] Ensure the appropriate GHC is installed (1m)
Error: Command failed with exit code 1 (EPERM): stack --allow-different-user setup
at makeError (/builds/cgenie/purescript-gargantext/node_modules/purescript-installer/node_modules/execa/lib/error.js:59:11)
at handlePromise (/builds/cgenie/purescript-gargantext/node_modules/purescript-installer/node_modules/execa/index.js:112:26)
at runMicrotasks (<anonymous>)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
Cleaning up file based variables
ERROR: Job failed: exit code 1