Use GitLab CI for testing

Tests for D10 are failing, and also some for D9. The ones for migration are expected to fail because of a core issue 🌱 [META] Serialization issues in Migration tests Active , the others are not. Setting this to needs work, just so it's clear this is still being worked on. But the gitlab CI seems to work as expected, so maybe a new issue is needed? Not sure.

The test are passing for D9 and D10 with the latest changes to the dev branch, so this can be merged and the Drupal CI testing needs to be disabled so to primarily use the gitlab CI. Marking it as RTBC, as there should be nothing to review.

Automatically closed - issue fixed for 2 weeks with no activity.