CI: add debug trace in centos jobs
Don't merge !
The Centos prepare job in CI builds in broken. However the logs don't give a lot of infos. In this branch the CI_DEBUG_TRACE
has been set to true, and this MR has been created to trigger a centos job
https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/-/jobs/26249
Edited by Cédric Traizet