ci: Count 'ERROR' codes as failures

Otherwise they'll be dropped from our reports.
9 jobs for ci-error-report in 18 minutes and 34 seconds
Status Job ID Name Coverage
  .Pre
passed #668485
style-check-diff

00:03:45

 
  Build
failed #668486
fedora-x86_64

00:14:24

passed #668488
win32
msys2-mingw32

00:04:59

failed #668487
release-build

00:14:48

 
  Analysis
skipped #668489
allowed to fail
static-scan
 
  Docs
skipped #668490
reference
 
  Flatpak
skipped #668491
flatpak allowed to fail manual
flatpak-manual:demo
skipped #668493
flatpak allowed to fail manual
flatpak-manual:icon-browser
skipped #668492
flatpak allowed to fail manual
flatpak-manual:widget-factory
 
Name Stage Failure
failed
release-build Build
/builds/GNOME/gtk/_build/report.html: found 1 matching files 
/builds/GNOME/gtk/_build/testsuite/reftests/output/*.png: found 266 matching files

/builds/GNOME/gtk/_build/testsuite/gsk/compare/*/*.png: found 93 matching files

WARNING: /builds/GNOME/gtk/_build/testsuite/css/output/*.syscap: no matching files
Uploading artifacts to coordinator... ok
id=668487 responseStatus=201 Created token=obHBtyDv
Uploading artifacts...
/builds/GNOME/gtk/_build/report.xml: found 1 matching files

Uploading artifacts to coordinator... ok
id=668487 responseStatus=201 Created token=obHBtyDv
ERROR: Job failed: exit code 1
failed
fedora-x86_64 Build
/builds/GNOME/gtk/_build/report.html: found 1 matching files 
/builds/GNOME/gtk/_build/testsuite/reftests/output/*.png: found 266 matching files

/builds/GNOME/gtk/_build/testsuite/gsk/compare/*/*.png: found 93 matching files

WARNING: /builds/GNOME/gtk/_build/testsuite/css/output/*.syscap: no matching files
Uploading artifacts to coordinator... ok
id=668486 responseStatus=201 Created token=6aza8GRS
Uploading artifacts...
/builds/GNOME/gtk/_build/report.xml: found 1 matching files

Uploading artifacts to coordinator... ok
id=668486 responseStatus=201 Created token=6aza8GRS
ERROR: Job failed: exit code 1