test: give strace some time to initialize
    
    The `coproc` implementation seems to be a little bit different in older
    bash versions, so the `strace` is sometimes started AFTER `systemctl
    daemon-reload`, which causes unexpected fails. Let's help it a little by
    sleeping for a bit.
    
    (cherry picked from commit c7367d7cfdfdcec98f8659f0ed3f1d7b77123903)
    
    Related: #1808940
    
    patch_name: 0338-test-give-strace-some-time-to-initialize.patch
    present_in_specfile: true
    location_in_specfile: 338
    squash_commits: true