Update stylelint rule function-whitespace-after to be consistent with Drupal's CSS standards

This needs reroll for 10.1.x.

Patch for 10.1.x.

#29 needs a reroll.

Adding a reroll patch for #29.

#32 applies now.

As far as I can tell this is still blocked on #16/#17 and #2944596: Create a coding standard for CSS to ensure whitespace after function calls → .

Marking postponed, but also needs an issue summary update. If we want to commit it before the standard is in place (which I can see doing since it's just a single example in core), that should also be documented in the issue summary.