Use mask in gather proxy behaviour

3 jobs for !1018 with ahennequ_proxy in 25 seconds (queued for 5 seconds)
detached
Status Name Job ID Coverage
  Test
passed check-copyright #17910101

00:00:13

failed check-formatting #17910102

00:00:25

 
  .Post
skipped update references (for shifters only) #17910103
allowed to fail manual
 
Name Stage Failure
failed
check-formatting Test
   curl https://gitlab.cern.ch/lhcb/Phys/-/jobs/17910102/artifacts/raw/apply-formatting.patch | git am

=======================================
Uploading artifacts for failed job
Uploading artifacts...
apply-formatting.patch: found 1 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=17910102 responseStatus=201 Created token=EG7tz_EG
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1