releng: pylintrc fixes for Fedora 37
    
    On F37 there's pylint-2.14.4-3.fc37.noarch.  This started producing a
    new warning:
    
        Error: PYLINT_WARNING:
        Unrecognized option found: bad-functions, max-branchs
    
    The 'max-branchs' looks like a typo, 'max-branches' works fine (fixed).
    
    Not sure about the 'bad-functions'.  I fail to find the corresponding
    PyLint change, but I don't think it matters too much (dropped).
    
    Merges: #2351