journal: rely on _cleanup_free_ to free a temporary string used in client_context_read_cgroup
    
    Closes https://github.com/systemd/systemd/issues/11253.
    
    (cherry picked from commit ef30f7cac18a810814ada7e6a68a31d48cc9fccd)
    
    Resolves: #1764560
    
    patch_name: 0249-journal-rely-on-_cleanup_free_-to-free-a-temporary-s.patch
    present_in_specfile: true
    location_in_specfile: 249
    squash_commits: true