Remove \centering of LaTeX output of Pandoc

uncentering-figures.lua

-- This script avoid the centering of figures in LaTeX pdf by Pandoc.
-- This script can be used with pandoc-crossref. 
-- You can use this script like:
--   pandoc -s --lua-filter uncentering-figures.lua -o output.pdf input.md

-- MIT License

-- Copyright (c) 2023 flat35hd99

-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:

-- The above copyright notice and this permission notice shall be included in all
-- copies or substantial portions of the Software.

-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-- SOFTWARE.

function Image(elem)
    local src = pandoc.utils.stringify(elem.src)

    local alt = ''
    for i, v in ipairs(elem.caption) do
        if v == nil or v.text == nil then
            goto continue
        end
        
        if v.t == 'Math' then
            alt = alt .. ' \\(' .. v.text .. '\\)'
        else
            alt = alt .. ' ' .. v.text
        end
        ::continue::
    end

    if elem.attr.identifier == '' then
        return pandoc.RawInline('latex',
               '\\begin{figure}\n'
            .. '\\includegraphics{' .. src .. '}\n'
            .. '\\caption{' .. alt .. '}\n'
            .. '\\end{figure}\n'
        )
    end

    return
        pandoc.RawInline('latex',
               '\\begin{figure}\n'
            .. '\\hypertarget{' .. elem.attr.identifier .. '}{%\n'
            .. '\\includegraphics{' .. src .. '}\n'
            .. '\\caption{' .. alt .. '}\n\\label{' .. elem.attr.identifier .. '}\n'
            .. '}\n'
            .. '\\end{figure}\n'
        )
end