format-table: add option to uppercase cells on display
    
    This adds a per-cell option for uppercasing displayed strings.
    Implicitly turn this on for the header row. The fact that we format the
    table header in uppercase is a formatting thing after all, hence should
    be applied by the formatter, i.e. the table display code.
    
    Moreover, this provides us with the benefit that we can more nicely
    reuse the specified table headers as JSON field names, like we already
    do: json field names are usually not uppercase.
    
    (cherry picked from commit 359abf6dd05aa6bca3438e9c969ed904bd3d447d)
    
    Related: #1689832
    
    patch_name: 0136-format-table-add-option-to-uppercase-cells-on-displa.patch
    present_in_specfile: true
    location_in_specfile: 136
    squash_commits: true