Make the Gallery block not use <ul> tags

[STHLMWebDesign]

Does the gallery block have to use <ul> and <li> elements? It's not correct, a picture gallery is not an unordered list. Plus it creates possible styling conflicts. Gutenberg styles actual unordered lists without any CSS classes. So there is a likely scenario where theme author could style unordered lists by target the parent post container .post-content ul in that case this CSS styling risks being passed along to ul.wp-block-gallery

I suppose a quick fix would be to make Gutenberg apply a CSS class to both unordered and ordered lists for theme authors to target, but I still have to point out that an image gallery is not an unordered list.

[swissspidy]

A gallery is a list of pictures, So I can understand where this is coming from.

The change was made in #3441 to fix #2900, which suggested this change.

I suppose a quick fix would be to make Gutenberg apply a CSS class to both unordered and ordered lists for theme authors to target

Related: #12420

[youknowriad]

As discussed in the previous issue and suggested by the a11y team, the decision for now is to keep the Gallery as a list of images, we can still revisit in the future if needed.