tests: add reproducers for several issues uncovered with fuzz-journald-syslog
    
    This is a follow-up to a70f343cacf03ac51cdefb0d2e.
    
    (cherry picked from commit 3311c74d0560e4aa6a223f5e288a5fbf2404d3fa)
    
    Resolves: #1696224
    
    patch_name: 0148-tests-add-reproducers-for-several-issues-uncovered-w.patch
    present_in_specfile: true
    location_in_specfile: 148
    squash_commits: true