Backport PR #24265 on branch v3.6.x (Restore (and warn on) seaborn styles in style.library)#24270

QuLogic merged 1 commit intomatplotlib:v3.6.xmatplotlib/matplotlib:v3.6.xfrom

meeseeksmachine:auto-backport-of-pr-24265-on-v3.6.xmeeseeksmachine/matplotlib:auto-backport-of-pr-24265-on-v3.6.xCopy head branch name to clipboard