Sweeping !1257 from master to devel: tests (CI): replace jenkins DMS tests with gitlab manual job
https://github.com/DIRACGrid/DIRAC/pull/6283 is needed first
BEGINRELEASENOTES
*Tests
NEW: add a manual CI job for DMS tests
ENDRELEASENOTES
https://github.com/DIRACGrid/DIRAC/pull/6283 is needed first
BEGINRELEASENOTES
*Tests
NEW: add a manual CI job for DMS tests
ENDRELEASENOTES