Fix rich text editor suggestions user alignment when using tailwind

What does this MR do and why?

Fix alignment issues in the rich text editor suggestions dropdown.

In the old utils gl-flex did not exist. In the tailwind generated one’s it does

So before gl-flex was useless and had no effect and now it does, canceling the effect of vertical-align: middle.

Also updated the spacing to match non-rich text editor

MR acceptance checklist

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Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

Note: Please revert the changes below after a review, otherwise you might run into CSS issues on other branches

1. In rails console (or via toogle: http://127.0.0.1:3000/rails/features)

   Feature.enable(:tailwind_all_the_way)

2. In your GDK, add: export TAILWIND_ALL_THE_WAY=true to env.runit
3. In /gitlab/ run yarn run tailwindcss:build
4. Restart webpack / vite: gdk restart webpack / gdk restart vite
5. Visit any page. The page should look visually alright and a CSS file named assets/tailwind_all_the_way-[hash].css should be loaded