Remove Release Managers' special credentials on GitLab
Once post-release issue triaging is done with a dedicated role user (#17747 (closed), #17589 (closed)), we can drop RMs' special credentials on GitLab, that won't be needed anymore.
Once post-release issue triaging is done with a dedicated role user (#17747 (closed), #17589 (closed)), we can drop RMs' special credentials on GitLab, that won't be needed anymore.