Issue #3418207 followup by longwave, fjgarlin: Spell-checking job fails with "couldn't find remote ref refs/heads/11.x" when 11.x branch does not exist in fork

Issue #3418207 by longwave, fjgarlin, acbramley, mondrake, neclimdul: Spell-checking job fails with "couldn't find remote ref refs/heads/11.x" when 11.x branch does not exist in fork

Issue #3401988 by fjgarlin, acbramley, longwave, mstrelan, drumm: Spell-checking job fails with "Argument list too long" when too many files are changed

Issue #3412415 by larowlan, fjgarlin, longwave, drumm, benjifisher: Make CI template compatible with private repositories

This reverts commit aec5864a.

Issue #3385621 by fjgarlin, andypost, dimitriskr, longwave: [GitlabCI] MariaDB currently not working

Issue #3391689 by catch, alexpott, smustgrave: Add a performance tests job to gitlab and send data to OpenTelemetry

Issue #3375693 by andypost, catch, longwave, quietone: Fix deprecated assert_options() function usage for PHP 8.3

Issue #3388952 by catch, fjgarlin: Tweak gitlab CI concurrency, parallelism and test running order for 11 minute test runs

Issue #3390341 by quietone, smustgrave: Remove words removed from file but still in cspell:ignore lines

Issue #3390073 by catch, fjgarlin: Use 'needs' instead of 'dependencies' to speed up gitlab CI jobs and run phpstan first

Issue #3386076 by fjgarlin, catch, longwave, larowlan, mstrelan, el7cosmos, RoSk0, xurizaemon, poker10, alexpott, bbrala, nick_schuch: GitLab CI integration for core