Investigate how centering should work with `.. list-table` and `align: center`

[pradyunsg]

Discussed in #768

^{Originally posted by PierreMarchand20 February 9, 2024}
When using :align: center in .. list-table::, the table is flushed to the left and the text is centered. Without this option, the text is flushed to the left but the table is centered (see below).

In the first case, the html element is

while in the second case,